Amp for Sopra No. 1

I have a pair of Sopra 1s coming from Focal in France. I'm familiar with their sound from hearing in local shops and on a buddy's system where he runs them with Mac monoblocks. I'm looking for a good solid-state match for these. Current amp is a Pass Labs which sounds fine, but I've been looking to move on to something a bit more oriented to rock, meaning a more solid low-end for one thing, some female vocals, along with almost anything else in lesser amounts except classical/opera. What have other Sopra owners found? Thanks.