FWIW, your amp selection should be made after you determine what kind of speakers you want to drive. They are interdependent. I agree with Gthrush regarding speakers - unless you have highly revealing speakers I doubt that you will gain from the benefits involved in using mono amps. Also, while the Vandersteens are excellent speakers in their price range and are easy to drive, I'm not sure I would call them all that revealing. For revealing speakers add Silverlines to your list for audition.
Are monoblocks the way to go?
I'm upgrading my system piece by piece. I recently bought an Ah! Njoe Tjoeb CD Player and an Eastern Electric MiniMax tubed Preamp. I would next like to upgrade my Adcom Amp to a tubed Amp and I'm considering going with Monoblocks. While auditioning Preamps, I was very impressed by a pair of Quicksiver 100 Mono's - exceptional build quality and value. I had originally been leaning towards the Cary Rocket 88. I have vintage Klipsch Heresy speakers that I plan to keep. My goal is to create a system that is very transparent with a lifelike 3D soundstage. I need no more than 25 wpc since the Heresy's are 96db/1watt/1m. Any opinions on Mono's vs single amps? Thanks.