Matching Amp to Wilson Sophia 2

I recently acquired Wilson Sophia 2's and am enjoying them but I'm wondering if I can do better in terms of amp matching. I currently use Theta Citadel 1.5's. I would prefer a little more midbass (Sophias are currently closer to the front wall than I would like, but pulling them out reduces body).

These speakers aren't overly sensitive (89db) and run at 4ohms.

I also wouldn't mind a little more midrange bloom (I do like tubes!) but don't want to lose anything in the highs.

Amps I've been thinking about: McIntosh, Pass.

Love to hear your thoughts.
Thanks.