If you were going to use a "separate" power amplifier for the fronts and/ or center, what would you use to drive the amp? A receiver or a pre processor?

What choice?

Why?

What are your key feature trades?

I'm still looking to upgrade and haven't made up my mind.

The Rat. M80s, VP-150, QS8s, SVS PC 20-39+, OPPO, Onkyo 703s, Harmony 880 Sony 60" SXRD HDTV