Need Preamp and Amp to Match Vandersteen 3A Signature Speakers


I am a neophyte at hifi.   Just bought a pair of Vandersteen 3A signature speakers to replace the JBL l150A speakers that I had for years..   I want to replace the Parasound A23 amp and the Parasound P5 preamp that I currently have with something that will make the Vandersteen speakers perform at their best.     I would like to get a Class A or A/B amp.   I listen to a lot of rock and jazz.   My room is about 16' x 16'.   Can anyone give me some advice what preamp and amp would work best with these speakers.   There is so much info out there and it is very confusing.  I like a rich full sound, not harsh on the high notes.  Also like a rich, well defined base.    Thanks for any advice you can give me!!!
darmento
Belles would likely do well (Johnny can tell you how well), or more upmarket Aesthetix or Backert preamp+Pass amp.
Thanks everyone for your input.  I forgot to add that my total budget is $6K and I am OK with tube amps, provided the sound is warmer and less analytic.   Thanks again - it is so great to get advice from people who know what they are talking about.  It is confusing out there!!!
If these are still available from Audio Advisor, at $499. each, you can get a pair of Nuforce STA 200 amps and vertically bi amp your Vandersteens ( you can also biamp horizontally, but I prefer vertical, which is one amp per speaker ). If your sources produce 2 volts output, you can go passive ( I use a Luminous Audio Axiom Walker mod unit, which is awesome. You will have plenty of money left over for other things, cables, music, etc. And if you, or anyone else, laughs at my suggestion, it is your loss. Your money. Enjoy ! MrD.
@darmento If you don't think it's confusing in here, you haven't been here long enough.

Another recommendation then: Rogue Cronus Magnum II.
The deHavilland pre amplifiers are world beaters. Not expensive, made in USA and sold directly to people like you. The output is customized to you amplifier.