I have studio 60's, a cc690, and atom monitors for surrounds(wanted 20's, but I wanted the elite 150fd more). My subwoofer is the pw2200(which may not be the best sub, but it has no problem filling a room with bass) I use a pioneer vsx91(110wpc) to power the speakers set to large and crossed over at 80hz. I can say that I listen to movies and concerts really loud. I'm talking 100db with sub unplugged(I check. With spl meter) and speakers set to large but set to cross over at 80hz. I sit 10.5 feet away and my room has no treatments. The pio does a good job of providing clarity and dynamics to movie sound tracks(transformers HD DVD) and concerts(Queen rock Montreal being my favourite) Now I know that a separate amp will do a better job at everything, but when you're on a budget or have to please a wife, the pio can give you plenty of entertainment. Now I'm only running the 60's in stereo, full range, bi-amped, no sub, and it sounds good until I get the bass too loud. That's when the distortion kicks in. My final word is if you're using a subwoofer, and your set up is 5.1 so you can bi-amp the fronts, then the pio should be able to give you a good experience. Good, not great. A separate amp would give you that extra bit that these speakers deserve.
Hope you find what you're looking for. I'm looking for an amp and subwoofer. Can't make up my mind. I think parasound is my safest bet. I've heard there sound and it has everything I want. Subwoofer wise, too many options.
Good luck
David Budo