lol Hi Guys......I gave you the name's of the disc's that vibrate. lol I have several DVD players scattered round the house (I have to stop) and tried them on various DVD players 3 or so and had no problem with them and also took to the shop and they had the problem too on two other seperate Denon 2200 statistically that is significant. I also spoke to Denon's UK repair company and they said yes they do sometimes get this vibration problem here's one of the emails
Thank you for your e-mail regarding Denon products.
With different DVD software there maybe different Mega bites of information on the disc, in certain cases this may cause the DVD player to read the information at different speeds (i.e SACD), this can cause a certain amount of vibration which is normal. However if this is getting in the way of your viewing or listening pleasure then we would suggest that you speak to your Denon dealer so he can inspect the unit.
Regards
Product Support
Note this vibration was on DVD too I didn't test too many CD's but will do when set up again in a few months.
Note this is the first time I've every brought any AV/Hifi product back to a shop never mind a DVD player so it took a bit for me to do it.
Anyway cause I was building a new room I need a new player and opted for a DVD 757ai (won on Ebay) anyway I did comparison's with Lord of rings (especially in fellowship where they are underground - Trolls, demons) this can really test the black, etc, out. Matrix and Terminator. I did adjust picture quality on both and from what I could see the Pioneer looked better. You can see my equipment list (not all on there). This is what I think is better. I have not tried pioneer 668 but have tried other brands of DVD players. Note this is RGB scart not progressive use yet (thats for the other room)
Here's the ones I've tried the discs I mentioned before on
various computer DVD to plasma connection
pioneer 757
sony davs 300
cyberhome
denon 2200
pioneer 727
micro
panasonic (cant remember model, sisters)
The vibration was only on the Denon 2200. What was ironic was my wife said to me whats that noise... I said must be the sky box, so looked at sky, vcr everything did not even look at Denon (as I thought can't be that then I touched it) and yes it was not minor vibration either. I had 5.1 connected round the back two channel audio, scart, digital, all kinds of wires I had to disconnect from back of AV amp to bring to shop lol.
I didn't even have to feel awkard when my wife saw me with the vibrapads she wanted them too! (I think my glass shelf didn't help) .
I have no worries if yours only vibrates at menu start up. Great I do like the Denon don't get me wrong I reckon if I pushed hard enough I could exchange (maybe with some cash for better model) but will stick with it for now.
Remember the original question was what experience we had with 757 vs denon 2200. I have given my direct experience of these.

__________________