I'll start by thanking anyone in advance for the help. Let me give an idea of what I am working with and the reasons I really can't or don't want to change it. My avr is a Sony str-dn1050. I have a polks csi a6 center, rti12 front l/r, rti10 surround l/r. Rti150 surround back l/r, and 2 klipsch rs12 subs. I love the way my setup sounds but I really feel like I am underpowering everything but my subs and center channel. Therefore I want to investigate external amps for all channels and big amping everything. The one problem is that my sony does not have pre amp out so I would need to do line level conversions. I cannot change from sony (wife's orders) because of the pure convenience of bravia sync, which makes her life so much easier. I also really like the 1050 minus it not having pre outs. I have never done external amplification so I am unsure at which direction to go, but I know I want to because everything I have read says these polks are underwhelming unless you give them a fair amount of power. Is there any amps that you all can recommend to me that will allow me to do my own frequency management for bi amping, or am I wasting my time bi amping and should just let the internal crossover do all the work? I'm also trying to stay away from filing bankruptcy because of huge amp prices, so try and take it easy on me. Thanks a lot.