well right now I have a yamaha rx-v1700 AVR powering my cornwalls and my sub. would that be considered my pre amp, and would I just hook up a tub amp to it? I'm assuming an integrated amp is the pre amp and power amp, and would also be the cheaper way to go. From what I've read, the bottom end sound of tube amps in my price range are a bit lacking so I'm guessing I might need a sub out on the tube amp as well, any suggestions?
Video: Samsung PN648500AF, Panasonic TC-P60GT50
Audio: Onkyo TX-NR818 with B&K Reference 200.7, Behringer iNuke 3000DSP for subs
Speakers: Klipsch RF-7 II's, RC-64, RS-62's RSW-15, Dual DIY Stereo Integrity 18" Subwoofers
Misc: Xbox 360, PS3 Slim, Wii U, Apple TV, Chromecast