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
John Rutan played them for me on several occasions with different gear, but one night, we were chatting, and he played them with an Audio Research 100.2 amp. It was amazing! Ever since then, I have wanted that amp. So alive and colorful, great pace and bass control, which can be an issue with those great speakers.
McCormack amps are also known to sound good with the 3a sigs.  When I had them I drove them with a DNA-0.5 Deluxe and they sounded fantastic.
ya the Mac and the big Threshold have vise like control of that bass coupler...dial it into the sweet spot and BAMMMMMM...
There is a Belles 350 on A'gon right now that will fill the bill.  Just pick a tube preamp of your choice and the DeHavilland mentioned earlier is a good one.

https://www.audiogon.com/listings/lis96dbg-belles-350a-solid-state?refsource=hifishark