I have now had an AVR600 for a few days. Normally this wouldn't be long enough for me to be able to fully opine on a piece, but the 600 was so easy to use that I got the maximum benefit from my time. Being familiar with Arcam was a great help here. Everything in this review is my own opinion and direct experience, some others may have a different experience, as their requirements may differ greatly. Before anyone gets on my case here, issues with the unit will be dealt with in the second part. The following headings are in no particular order. 1.Overall sound quality. Quite simply, this unit is sonically stunning. It is a major leap forward for Arcam in many ways, I'll touch on them as I progress. The imaging is impeccable, and the unit is easily capable of gossamer light delicacy or some serious sonic violence, depending on what the source demands. I would say it has a surgical clarity that I've never heard in a receiver before. The best sounding receiver prior to this was the 350, but the 600 is well ahead of that. £3k may be expensive for a receiver, but for an audiophile unit that kind of money is small potatoes indeed. This unit, when coupled with good speakers and in a room that has been properly treated and corrected, is capable of serious audiophile quality reproduction. More on the test systems later, but they form 2 pairs of systems..... a Linn Akurate and Dynaudio Contour, both using Gotham subs, and the colossal Dynaudio M4 and Genelec 1036a, both using HTs6 subs. 2. Ease of use. Nothing much new to say here. Its well laid out and organized. The menus are very easy to follow and logical to use. Its connectivity is amazing and very flexible indeed. The sources that are audio only, like TAPE, can have a video feed assigned to it. As an example, it takes seconds to have an HDTV video feed coupled with an internet radio sound source. Things like disabling HDMI audio on specific inputs works fine too, so satellite users will be happy there. The Networking is set up in an instant and the internet radio is very easy to use and personalize. All the VP settings are "per source" as are things like room EQ and processing modes. 7.1 users who need PLIIx can set the unit such that it will always engage if there is a 5.1 signal, no need to select it. Spend some time with this unit to set your options as you wish and you will find that the unit simply begins to disappear, you don't have to work at it. All adjustments are shown as on-screen pop ups, this can be disabled if you wish. 3.Auto adjustment. I'm not a fan of automated set-up and room correction. I am a correction fan, but prefer the use of systems like the Dolby Lake as they are vastly more flexible and provide markedly superior results. I was, however pleasantly surprised. The system fires a broadband noise burst from each speaker, it does 2 rounds then does its calculations. I found, in the 3 rooms I tried, it got the speaker distances spot on. They were within an inch of the actual measured distances. The crossover frequencies listed for each speaker looked reasonable too (there is one master crossover). The speaker levels were also close to ideal. when testing is done you can see all the results, you then select "accept" to store those values. You can adjust them manually later anyway, if need be. The other part is the Room EQ. Even when you select "accept" as above, the room EQ is not applied by default. This is a good option, as it means you can still use the other measurements. The room EQ can then be selected, or not, for each individual source. The analysis looks at the broadband noise through the calibrated microphone and tries to even out any room resonances you may have. The first room I tried was well treated, and had good geometry. Engaging the room EQ made a small but noticeable difference, but not near as good as the system already there, that was as much as I expected anyway. I certainly didn't do any damage. The second room was smaller and is awaiting treatment, the improvement was very noticeable indeed. Switching the EQ repeatedly in and out revealed a number of changes. Fidelity was improved, separation and fine detail was better and vocal ineligibility was improved. Delicate ambient sounds like rain or crickets were far better. Obviously the difference is source dependent, if the source doesn't impinge too much on the problem areas, the difference will be less apparent. I would urge anyone to take the 5 minutes to run an analysis and see how the room correction works for you. If you don't have an SPL meter and tape measure, you will at least have a decent start point for distance,level and crossover. The software is by Analog Devices, the guys who provide the SHARC DSP chips. They are very well known in audio circles. 4.Video processing. More than anything, I simply wanted to see a transparent pass through, ie when no VP functions are selected. The seems to be the case here. There is actually a fair bit going on under the hood here that may not be immediately apparent. I'm happy to report that I didn't encounter any nasty surprises. I use 1080 sources almost exclusively, but had a look at some other resolutions to test the scaling clarity. No problems at all. On close inspection, it scales SD-DVD better than the 360, PS3 and a satellite box so it will have it uses. The contrast, brightness and color all work as expected. Noise reduction is more interesting, and yielded some minor improvements with noisy SD material. The normal types are represented here. There is an Edge Enhancement feature too. This has no place with good source material, but did yield a reasonable result with some soft sources, picking out some extra detail. With good stuff, it just looks crazy. People end up with faces that look like they have some serious skin disorder. Every pore looks like a mine shaft. I have no use for the VP as I use native processong. Others may differ and benefit from making some "per source" adjustments to the big 3...Brightness, Contrast and Color. I have no issues whatsoever with the neutral passage of 1080p24. Just make sure you select Auto in the frame rate pull down. Thats the first part done. I'll try to do the other half tomorrow. I will look at surround performance, legacy AV9 head to head, issues and resolutions, Dolby Volume, network use, etc. Hope this helps and is of interest.