Sbachman -
Recently, I had a chance to audition the Plinius. Really
nice amp. I can't claim to know the effects of matching
the Plinius with Proceed. But, if you are primarily concerned with your two channel sound, maybe you
should start with the two channel amp and then try to
find a three channel amp that will match up. Levinson
also makes two and three channel amps. Even if you
buy a two and three channel Proceed amp, I believe you'll get better two channel sound that way than buying a 5 channel amp. I believe Bryston also makes two
and three channel amps. So, if you are concerned
with matching -- staying with the same manufacturer
or "family" [Levinson and Proceed] might simplify the process. Or, how about a Plinius SA-250 for your
front left and right, a SA-102 for the surrounds and
another SA-102, bridged, for the Center? That'd be
a nice Plinius system.