I'm with Bob--the preamp is likely a big, if not the biggest, weak link in your system. The good news is you can buy a high-end stereo preamp and just plug the front L/R outs from the B&K into any line-level input on the stereo preamp(the Pioneer also goes into the stereo preamp, which is obviously connected to the McCormack). This way for critical 2-channel listening you're only using the stereo preamp, but you can still use the B&K for movies/surround music--best of both worlds.
Also high on my list, although well behind the preamp, would be to mod the Pioneer(talk to someone like Ric Schultz at EVS, Stan Warren, Dan Wright, etc.) that will clean things up quite a bit, and also sending the McCormack to Smcaudio for the Rev. A mod.
If you're happy with your speakers I think these three upgrades would make major improvements, although again I'd definately start with the preamp. For what it's worth and best of luck.
Tim
Also high on my list, although well behind the preamp, would be to mod the Pioneer(talk to someone like Ric Schultz at EVS, Stan Warren, Dan Wright, etc.) that will clean things up quite a bit, and also sending the McCormack to Smcaudio for the Rev. A mod.
If you're happy with your speakers I think these three upgrades would make major improvements, although again I'd definately start with the preamp. For what it's worth and best of luck.
Tim