Recommend a SS amp for my new Vandersteen Quatro CT

Congrats. on your Quatro CTs!!  You have many smiles in store.  One caution...be patient about break-in.  The CT tweeters take considerable time to fully form.  Your patience will be rewarded.

As far as amplifiers go, I am using an SMc Audio Revision A+ modified McCormack DNA-1 amp on my Treo CTs mated to two 2wq subwoofers.  I've spent enough time reading various threads here to realize that there are many fine amps out there that would sound great with your Quatro CTs.  One thing... with the built in powered subs. your amp will not need to be as robust as it will not be powering the lowest bass.

I love the sound I have now, but if you are open to a tube amp, Quicksilvers can produce heavenly music with Vandys.

There are endless recommendations for ARC tube and Ayre SS amps with Audioquest cabling. I use ARC pre with Ayre and Nordost Frey2/Tyr 2 with my 3A Sigs. Great sound.

Ayre or Aesthetix will bring you joy!

You are in for a real treat :-)
IMO either amp you own excellent place to start - just make sure to properly adjust Low Pass filter DIP switches when changing amps. !!!!!
i have heard Quatro CT at many dealers across USA  with Ayre, Aesthetix, Rogue, ARC ( Ref 150, HD220 ) as well as VTL. frankly all were outstanding - I have also had a REF 75 at home running my 7 mk2 and can attest that it is one sweet amp !!!
i have an Ayre VX--R Twenty, you might give that a try - I think Richard and Charlie are pretty aligned on many design considerations and philosophy. 
importanly the Filters are RCA or balanced but not both so plan ahead there.
the Aesthetix amp has built in filter should you go that route.
where are you located ?

Sounds like the new Belles Aria preamp and monoblock power amps are also a good match for the new Vandersteens.