Magnepan or Carver???

I would go Magnepan simply because I never have heard anyone praise those Carver speakers. To me the silence says alot.

You're moving from a very high sensitivity speaker - Klipsch- to a very low sensitivity speaker - Maggie.
Is your amp up to the challenge? You may not like what you hear and it's not the speakers fault.

drumhead makes a really good point--you need a ton of power for either the maggies or the carver. another consideration is that many people (myself included) feel the maggies need a sub or two (they don't go as deep as the carvers). yet another consideration is that placement is extremely critical to both. all that said, if you're up for the challenge and you've got the $$, i'd pop for the 3.6 maggies, which really do sound great under optimal conditions.