Is adding a power amp to an A/V receiver worth it?

Is adding a high-quality power amp to a receiver-based system worth it? I've built my system gradually over the years and the receiver is now one of the weak links in my system relative to my source and speakers. I would like to put a high-quality power amp behind my front three speakers bypassing the receiver's amps, but I'm concerned I won't be getting the full benefit of a dedicated amplifier without a high-end dedicated pre/pro to feed it clean signals.

I'm happy with the receiver's features and would like to continue using it as my preamp/processor. However, I don't want to spend good money on an amp to have it strangled by a (relatively) mid-fi receiver upstream. As you can see from my system below, some components are in different "leagues" than others, but that's what can happen when you build a system over time. Overall, it's a very enjoyable system and I've taken the time to calibrate it properly. I use my system roughly 60/40% music/movies.

Can anyone comment on their experience with this dilemma?

My system:

Arcam FMJ CD23 cd player
Sony DVP-C600D dvd carousel
Technics SL-5 direct-drive turntable with Grado cartridge
RCA Hifi VCR
Sony GA-7ES ProLogic A/V receiver ("5.1 ready" and with preouts for the front 3 channels)
Hales Revelation Two main speakers (front L/R)
Hales Revelation Center (front center)
Snell SR.5 bipolar surrounds
Acoustic Research "high output" 8" sub (downfiring)
Sony KV-34XBR800 34" widescreen monitor
AudioQuest Coral interconnect (cd player)
AudioQuest Video 2 (vcr composite video)
MIT Terninator 5 interconnect (dvd player)
MIT Terminator 5 speaker cable (for fronts)
MIT S-Res S-video interconnect (for DVD)
Monster subwoofer interconnect
Monster HTS-2000 surge protector
Harmony SST-768 remote (great unit!)
Salamander Synergy Twin 30 equipment rack