I am putting together an HT setup, and wish to use Polk fx500i surrounds, 450 sub, and cs 400i center to augment my good ole Monitor 10's. My room measures 12 x 18 wall to wall. I emailed Polk with a few questions about my plans, including any suggestions for amp specs to drive this set-up. I mentioned that I was looking at the HK avr225 for a receiver, and asked what they thought of the 55w into 8 ohm rating. The response I got was that the HK receiver was insufficient for a room of this size, and that I should be looking for between 100 to 150 watts/channel. Denon, Yamaha and Onkyo were suggested. No mention was made of average vs peak wattage. I only want a 5 channel receiver, and can't find anything with such an amp section without the bells & whistles (and big price tag). Do I really need this much juice?