The Classic 60 sounds fine, but its input stage uses FETs.
Eventually one hears the FET sound and may experience listening fatigue.
I prefer ARC's all-tube amps, the Golden Oldies.
Also, the Classic 60 is under-powered to properly drive Wilson speakers.
Daniel is correct in looking for something in the 150W neighborhood.
One more comment: Wilson usually demoes their speakers at Hi-Fi shows with VTL amps, you may want to audition them.
Vandersteen usually demoes with ARC, the ARC high-definition amps make the Vandies jump up and dance.
I believe both decisions were based on sinergy.
good luck
Eventually one hears the FET sound and may experience listening fatigue.
I prefer ARC's all-tube amps, the Golden Oldies.
Also, the Classic 60 is under-powered to properly drive Wilson speakers.
Daniel is correct in looking for something in the 150W neighborhood.
One more comment: Wilson usually demoes their speakers at Hi-Fi shows with VTL amps, you may want to audition them.
Vandersteen usually demoes with ARC, the ARC high-definition amps make the Vandies jump up and dance.
I believe both decisions were based on sinergy.
good luck