Wadia : what amp / preamp ?

I run my 270/27ix into the Mark Levinson #32 preamp and #33 amplifiers. The results are spectacular IMHO. BTW, the sound was much improved when changing to Transparent XL power cords on the Wadia gear.

I run my Wadia 850 into a Pass Labs X1 (solid state) preamp. This preamp is very transparent, and adds no euphonic coloration either yin or yang. IMO it gives body and dynamics to the music that I don't get when running directly into an amp. In my system I've also had an ARC LS25 (nice but too "tubey") and the Levinson 380S (left me uninvolved). I suppose TOP-end preamps, whether SS or tube, would be the way to go here (e.g., Levinson #32, ARC Ref2), but I could only afford the Pass for now. You might also want to check out the Sim P5 if you're in the "moderate" price range.

Levinson #32 and Levinson #33H/#33.

Wadia WT-2000 tweaked by Great Northern Sound; Placette Dual Active Mono preamp; Innersound ESL Monoblocks

Your amp choice should be dictated more by which speakers you use than what your source is, I would say.

Regardless, you can't go wrong with the Placette preamp.