Get yourself a Krell integrated, like the KAV300i or 500i. Krell and B&W are a proven good combination. Putting a high quality power amp after a receiver as a preamp - it might get you volume and oooph, but your resolution will suffer dramatically.
Need advice on amplifier upgrade
I currently have 802 matrix III,a rega planet cd player and a sony es receiver which I plan to upgrade soon. I'd like advice on which amps would match up well and whether I should go with an integrated amp or power amp using my sony as a pre amp until i can upgrade that down the road.