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

Try McIntosh MC7100 - I had used it before I switched to tubes. I thought it was much more musical than a lot of other more powerfull amps.

I currently have Vandersteen 2CE sigs. I had the ARC SP9 MK2 in my system for about one month. I went from B&K 4420 to a McCormack DNA-1. The McCormack seems to mate very well with the Vandersteens. Don't know what tubes you are using but, I purchased a pair of Amperex USN-CEPs and made a huge difference. Really opened up the pre. I liked the set up but, tried a TAD-150 from bizzy bee audio and had to switch. Anyway the McCormack is a great choice for around $800 and it can be upgraded by Steve McCormack to world class level. That is why I bought it.... If you are interested in the Amperex tubes, let me know.....

Eagleman

I'll umpteenth the McCormack recommendation, and from experience. Great synergy with Vandys.

You could buy a new Odyssey Stratos for around 1 grand

if you can get your hand on an older bedini amp..they sound great with vandersteen..my dad gave me one and loving it.i think the model like ba-803..they are big and heavy though..