VTL ST 150, Audio Research VT 100, mk. II

I was wondering if anyone could give some feedback on these two amps. I am thinking of replacing my Counterpoint SA 220. These are the two that are in my price range. They would be powering Vandersteen 2ce Signatures. My preamp is a Audible Illusions 3A.
Any information is appreciated.
Thanks.
Donw