Sopra 2 Amp Recommendation

Hi all,
I've got the upgrade bug and I wanted to get some advice from the community. Right now I have a pair of sopra no2's, a JL Sub, and an Anthem STR Integrated. I love the Anthem room correction so I am looking to keep it as my pre-amp OR swap to the STR Pre-Amp.

My main question is what to get for a power amp? I've read some other threads and haven't come to any firm conclusions. Soundstage and punch tend to be the main things I look for. I'm hoping to stay with some of the brands that are well known and hold their value a bit better (Anthem, Pass, Macintosh, etc). I'll probably buy used and spend $6-10k. Anyone have suggestions?