I just picked up a pair of NHT SB1s and SB2s, and I'd like to match up a decent receiver with them. My room is not very big - 21 x 11 - and I'd like to use the receiver for both music listening and HT. Would a Yamaha work well with the NHTs, or would that combo be too bright? What about HK; is that a better match? Budget is a mere $300-$400, so please recommend some good USED receivers in this range - (there's got to be a few that sound really good for the price). Please try to include model numbers, as I'm fairly new to what's currently out there. I appreciate your help.