I just use the entry level firman stuff. Cheap, and works for me. I have played thousands (well, close to) gigs, and never had an issue.
I can say though, that I would recommend a mcintosh power amp, like the mc50, which you can rack mount in a shallow case. With your fyd pre, you could use a six space and have both in it!
If you can't afford the mc, go with a carvin dcm200l. Great amp, and über clean! Close to Jerry. The rocktron, and you will find many here who agree, is further from the tone you are chasing.
Just my opinion, and opinions are like ass holes. We've all got them, and they're all full of shit!
All's well that sounds well.