I had a moment of madness this morning, and after convincing myself that my 6 month old HS20 was probably not worth upgrading, I went out and bought an HS50. Now I know there are lots people on here waiting to here from someone like myself, so I'll bravely give you my initial verdict. The first thing I noticed was that the this unit really is much quieter than the HS20.... not silent but a vast improvement, and if I'm honest I'd say that was actually the biggest influencing factor for me. Lense shift proved more useful than I imagined. I switched over the projectors on the ceiling mount, and lense shift catered for all my needs. In fact, I was able to get a more 'square on' picture with crisp focus accross the entire screen. Then, the resolution. This is weird one, as I sit very close to my 6ft Stewart Grayhawk screen, and the HS20 looked very clean, clear and detailed. In the nights before, I had zoomed in the HS20 by about 100 pixels to give me an idea of what the reduced resolution would look like, and I was admitedly nervous. Well, screen door IS more visible on the HS50 but I moved my chair back a further 1 foot, and visible pixel structure returned to what I was used to.... i.e. none! However the HS20 is clearly superior in this regard. When fed a progressive component input from my Denon DVD A1, good quality DVD's look much better on the HS50 (more on this later), but poor quality discs (where contrast is not an issue) actually don't look as good. I blame slightly inferior scaling combined with the reduction in resolution. The HS50 is plenty bright enough... my Stewart Grayhawk screen has only a 0.9 gain, and its fine.... in fact its perfect. Blacks are very dark, but they aren't absolute black... however they are quite a bit darker than the HS20. The dynamic iris works, but not as I had anticapted. On a freeze frame of a dark picture, I switched the iris between OFF, ON, and AUTO. OFF is very much like the HS20 ON, ON is a notch darker than the HS20 ON, and auto appears to be no darker than ON but with increased contrast...i.e... brighter. I can't quite fathom out what's going on, but it works! It really does make watching films that I would otherwise have disregarded on the HS20, more watchable. However, it still has an 'LCD' look about it.... I mean there is still a tiny bit of murkiness in some dark areas, but it is quite a bit better than the HS20. In fact, I've realised only today that you can watch a picture with a little more screendoor and still be absorbed by it... providing there's enough contrast. But, you can't watch a picture with insufficient contrast without being distracted by the murkiness... regardless of the resolution. So, with its better contrast the HS50 has to be a better projector. If you are easily annoyed by fan noise, then the HS50's appeal becomes very strong. However, if the primary role for your projector is watching Monster's Inc, and are satisfied with the 28db fan noise of the HS20, then the HS20 is a better projector. I will also miss the motorised zoom and focus on the HS20. On balance though, where it counts most the HS50 is IMO a worthy successor to the HS20. If you can get for less than £1500 (as I did, but I won't say where from on here), then it is indeed worth it. But I wouldn't pay any more.... it isn't quite that good.