Why not seek out a mid-'90s Hafler TransNova MosFet amp? Acoustat invented and patented the TransNova design for driving their speakers, and later sold it to Hafler. Actually, I think they continued to make TransNova amps for the recording studio market after they discontinued the TransNova 9505 (250 wpc) and 9303 (150 wpc) for home audio.
You might be able to pick one up for $350-450. I don't recommend the Series 915 preamp they designed with it, though. There are definitely faster more linear preamps out there in the same price range.
