Well, you know what I like... And I would've never ended up here had I not heard it in person first.
The c220 and 402 are not as good as the c2200 and 501 mono's I based my decision on.. but I simply could not afford the top o' the line. Also, the nice thing about Mc is that when it IS time to move up, I'll get most of my money back in the resale.... even if that's 20 years from now. hahaha As IF I could keep a system that long.
However, I do feel 'finished' with the Mc/Piega combo. I like Scot Nixon's non-oversampling USB DAC also. I pretty much copied Hantra's system piece by piece over the past few years. They still both sound very different from one another... but they do things that are very enjoyable.
This is a long way of saying it'll be hard to say what you will like in the end because only you know what will connect you to the music best. The Piega's are a fairly neutral speaker and can sound harsh or sweet depending on what's in front of them. They will provide a wide and deep soundstage and stunning imaging.... and show off everything upstream, from source to speaker cables. The Piega's aren't lively or relaxed. They just do their best with what they get. I learned this over and over... basically... it's NOT the speakers.
Anyway, they do like power, despite their reasonably efficient claim... The Mc's autoformers will work well with these speakers and give them a coherency that compliments their sound well. If I didn't go with a Mc, I'd look for good tube amps... Not sure what would be a good suggestion in that price range.
I have either limited or no experience with the amps/preamps you're considering. However, I can't see how the Belles would be a good match... from the little I know... just me. I would wager that'd be a bit on the cold side if that's what you like but with good impact. I like warm and sweet with detail and realism... sort of a tubey sound.
Anyway, that's what I know.. bottom line is you'll need to hear some stuff in your room to make this decision.. and comparing amps is tough.
Oh, one last note.. the C220 needs 2 things... new tubes or cryo'd existing tubes... and you must isolate the transformer. (fairly easy to do both) Then it's about as good as the 2200...
-C