I just completed my 7.1 system. NHT 2.9 NHT AudioCenter-2 4 x NHT 1.5 rears 2 x NHT SubTwoi I run them all as small, 80Hz, the subs in Mono, stacked in one corner off the LFE. The 2.9s run off a 250wpc power amp, the rest of the 5 speakers run off the Denon 3802s amplification. The 7.1 set up is just AWESOME. it makes a HUGE difference. I had thought it would be a minor, occasionally noticeable difference, but thats not right. Its a massive difference. Its a full 180 degree soundfield all the way around behind me, with very finely resolved movement of sound. No jumping from left to right or front to back. just fantastic! The only draw back is that when the levels are matched with a soundlevel meter, with actual material sometimes the rear 4 are louder than the front three. I'll have to play with the levels a bit till it feels just right. I think the next step is going to be be one speaker each on the left and right, at about 60° from the straight ahead. After that, I suppose there could be secondary speakers above and below to give a sound field in a volume, rather than on a plane.... Until that happens, I am going to enjoy my 7.1. ITS SUPER!!