I just got a new system as follows. Denon AVR X2100 mated to a set of Klipsch RF-42 II's and an RC-42II. I found out the 42's were not enough speaker for my room. I then moved to a pair of Klipsch RF-62II's and will soon get the matching RC-62II. It seems these are really efficient speakers but Klipsch recommends something with more power. I do not have surrounds as of now but will later add some in ceiling speakers. Do I have enough power? How do I know? My receiver is rated at 95w/channel in stereo, probably more like 65-70 watts using multi channels. The RF-62's are rated at about 125 rms.