This is an interesting question... I own a Yamaha RXV-995, and like it a lot. I don't think I will change it for a while. As you know, it delivers 100W x 5 RMS. I am designing my HT room, which measures roughly 22 x 15 x 8 ft. I own Definitive Technology bipolar speakers (BP8Bs, BP6Bs and a C1), plus a subwoofer for each front speaker (a Prosub 100), and a sub for the LFE (a PF15). Now, my speakers have a rated sensitivity of 92db/W. So I would have to assume that, along with the 3 subs, I might be able to get enough loudness in the room (even with absorbers and diffusors in place). I *think* I can get at least 110dB from my speakers / amp combo (I might have the calculations wrong here). My question is: would I benefit a lot from buying an amp? I was thinking about a 5 channel, 100w Adcom (just for the sake of better, not louder, sound). Is using my Yamaha as a preamp recommended? Any help would be greatly appreciated!