Magnepan and Bob Carver Raven amps

I know the Magnepans are not very efficient and most of the amps that are usually paired with these speakers are not to my licking.

I own the Bob Carver Raven mono block amps; Will these amps provide sufficient power for the Magnepans? They are rated at 350 RMS at 8 ohms and 400 at 4 ohms, but they are tubed so that may matter.

I was considering either the 3.7i or the 20.7.

ozzy