Let me be one new user to chime in and say that I have had ZERO problems with my AVM50, which I have had for a few weeks now.
The rattling around I heard, as reported earlier, was a loose screw that my dealer, authorized to service the units, opened up and quickly resolved.
I am continuously amazed by the sound and picture quality of this unit, this coming from a former VP50 and Aragon Stage One user. Setup was a breeze, not one hiccup.
Very happy with my purchase. My only possible regret is not holding out for a D2, but I'll revisit that sometime in the future.
One comment that I'd like to make regarding the previous discussion on amps. I can highly recommend the Aragon 8008 and Paladium line of amps as an affordable alternative, which were made before the Klipsch buyout. They represent the oldest pieces of equipment I have in my setup and each time I try to upgrade them, they end up winning out over their challenger. The only other amps that have sounded better to me (including the Anthems) were the Bryston's, which are in another price echelon altogether.
Something to consider - used 8008x5's run about $1500 to $2000 on Audiogon.