No David. Most are PP amps. If you want more extensive information on any one of them give Mike Sanders a phone call. He is pretty brief on emails and takes a while to reply sometimes. My ARC LS2B sounded great with my Mini Mites. Not sure, but I'd imagine that combination might be a good way to go with the Vandy's....they're pretty efficient aren't they? I've got a friend running his 100's with Aliante Pininfarina Ones and he loves that combination. I think your Vandy's are 88db efficient so may need a bit of kick from the amps unless you are in a very small room. If you're musical tastes tend toward rock, orchestral, and generally more layered more complex music with a bit of slam, the Silver 90's would be a nice amp. For almost anything else (vocals, acoustic music, smaller arrangements, individual instruments, etc.) I personally prefer the greater finesse and refinement of a PP amp (ultimately SET is what I like for myself, but that would not work well with your speakers). You are looking in the right direction as far as Sander's amps are concerned. Sorry I have no other direct experience to share, but I do think his products offer tremendous bang for the buck and are built like tanks. You may try a few searches here and on Audioasylum to get further input on specific models.