Preamp suggestions for Thiel 3.6 & Bryston 4B-sst

I have very similar setup and went from Bryston BP-25 to BAT VK-42SE (solid state) paired with Bryston amps (either PP300's or 7B-SST's). I am currently using Thiel SCS4 but have also had Revel Salons with the above combo. I like the BAT more than the BP-25. It sounds a little more smooth and better on the highs than the BP-25.

Mind you the cost difference between the 2 is quite large. MSRP BAT - $7000 and Bryston $2000 (back in the day). I paid $3500 for a 1 month old used BAT. I wouldn't have replaced the Bryston for something that costs much more than that due to diminishing returns.

Yyz, when you say better on the highs, can you elaborate please.

Timlub, I'd rather have the ease and convenience of SS but I kinda think I'm not going to get the sonic result I'm looking for without tubes somewhere in my chain, based on what I read. With my speakers I think I need the muscle and control of a beefy SS amp such as Bryston or Krell that doubles down under low impedance loads (my Thiel spend a fair amount of time under 4 ohms and dip to 2). That leaves the preamp to add the tube warmth and 3D imaging. That's my thinking to date anyway.

My Bryston BP25 has a very clear and transparent sound but it's on the dry and cold side.

I'll check out the classe ones you suggested, thanks.

Some ss amps are capable of warmth and 3D imaging.

I don't know the Thiel 3.6 but I have the Thiel CS2.4 and I'm finding the Lector ZOE as perfect preamp for the Thiel sound.
It's very detailed but with tube warm and sweetness.