I recently purchased Polk Audios LSi15's,LSiC Center Channel, and LSiFX surround speakers (all 4 Ohm speakers). I was informed in another thread that my TX-SR705 will not have enough power for these speakers without a seperate amp. Not being very well versed in these compatibility issues I am turning to those of you who can help me. I am looking for some suggestions on either a replacement reciever (but I love my 705) or some choices on compatible amplifiers that will bring the 705 up to snuff. Thx for your help.