amp for b&w 804 "s" with htm4 "s" 200 watts....

those are my speakers... there has been a lot of talk about the amps making the speakers sound better or worse...to be honest i still do not understand how that is. So, i guess i would probably go with... mcintosh, krell, classe, bryson, or anthem... only because everyone agrees on those amps.... would i really be able to tell the difference? i don't know. so this will be used for mostly HOME THEATER... that being said... i am looking for three channels all solid state. i will run my rear channel off of another amp. So my questions are

1 so.... one three channel amp? or three mono amps? or one two channel and one mono?
2 best bang for the buck on what manufacturer?
3 i would love to find used to save some cash..

thank you for your time on this,
Baranowski