Very cheap, very small, sort of powerful 3 ch amp


I'm selling a Sunfire Cinema Grand, picking up a Krell 400xi and probably an Outlaw 990. I need a 3 channel amp mostly for movies, and occasionally for DVD-A and SACD. The surrounds are Vienna Acoustics Bachs and the center is a VA Maestro. These speakers seem to respond well to higher wattage, but more importantly I am looking for something used and low cost (maybe $500ish?) and small. This seems like a perfect application for a small digital amplifier--I just don't know of one. I'm selling the cinema grand because I don't need the extra channels and it will be too big when the new additions arrive. I really can't think of a single amp that fits my criteria and am looking for help.
ultraviolet
Look for a six channel amp and bridge the channels to get three (more powerful)channnels. I did this with a used Rotel and it sounds great. There are switches on the back of the amp to bridge the channels.
Another 6 channel Rotel "bridger" here the RMB1075 is around $700 new so I am sure used would fit your budget, I ran this bridged and in 6 channel mode and thought it wouldnt be enough power, even at 60w per channel I never needed anything more (for movies).
AMC 2n100-3
I don't know the seller, but these AMC amps used meet your specification - cheap, small, sort of powerful (150 w/c).