Great, a local Rave!
Paul, I have a nice Forte Model 40 preamp (Forte was the "budget" line that Threshold made years ago) you can borrow indefinitely, and I can ask Tommy if he has a spare Cherry for a loaner if your own SS amp doesn't pan out. Or I can ask my bro - he probably has something at his store you could borrow.
I shudder to think what tube amps would cost to do justice to those speakers, power and quality-wise. And the heat oh man...
Have fun at the Rave.
-Mike