Ive been debating the idea for a while, I currently run a Yamaha RX-V620 receiver, which isn't that bad of a unit for me, but a little underpowered for what I run off of it. Ive been contemplating getting an external amp to drive my mains, but my receiver doesnt have preouts.....or should I say didnt. I finally got around to some serious cutting, and soldering, and now have preouts for the 5 channels. Now there's nothing holding me back from getting a decent amp!. There's a strange sensation, taking a dremel to an expensive piece of machinery like that .