Best used SS 100 - 150wpc for a grand or less?

There are several amps that meet your criteria, such as those made by Adcom, Rotel, and Parasound -- but the one I'd seriously consider is the Bryston 3B-ST (150 wpc). And if you can pony up only a couple of hundred extra dollars, you might be able to get the 4B-ST (250-300 wpc). Both of these amps are very clean, and work very well with Vandy speakers.

Aragon 8008ST, Classe CA-150, and McCormack DNA-1(or DNA-1 deluxe), come quickly to mind, as well as the above mentioned Bryston's. I've heard several systems sound good with the McCormack/Vandersteen combination. Good luck and happy hunting.

I would bet that a McCormack DNA 1, DNA 1 Deluxe would sound great in your system. Plenty of power for the Vandies. Its a very good SS amp under $1k.

I have a Threshold S/300 stasis driving my 4ohm Thiels.
150 wpc 8ohm 300 wpc 4ohm
This amp is in your price range.
It drives the Thiels with ease.

I would agree with the McCormack suggestions, I have used Vandersteen 2ce's with DNA 0.5 Deluxe amps with great success. Vandersteen's were often paired with McCormack amps at shows too.