What will drive the Vandersteen 1 C?

Preamp
audible illusion 2d or 3or 3a preamp
bat 3vki ( awesome pre- can be had for low as $750)

Amp
pse studio v monoblocks ( killer match)
pse studio iv stereo
muse stereo amp
quicksilver kt-88 ( killer match)

I am running a B&K Reference 4420 at 225 per channel on my 2CE Sigs. I had a B&K ST140 which also sounded good at 105 watts per channel. The ST140 used for the 1C at around $2-300 might be a good fit. It is warm, detailed and not bright...

Any of these will do just fine. The new Jungson 88-C is another good solid state option.

Many people prefer Vandy's with tube sources. The Jolida 1501-RC combination sounds very good, this is a hydrid tube-solid state design. You also might want to listen to some of the Jolida true tube integrated amps which used are very inexpensive.