Thanks for that.
I've got a Pass Labs Amp Camp Amp here, although not yet assembled. I recall Steve Guttenbergs comments about that, so I'll eventually do that project and give it a try. Doesn't help in the short term, though.
I'm trying to arrange an audition of a Dynaco ST-70 not far from me, but I haven't heard back from the seller yet.
There's a guy selling two McIntosh MC275 MK IV amps here in town, and I may break down and ask him to visit with one. It a fair chunk of change, but many comments I've heard in various reviews make me think this may be the best option (assuming I like the way it sounds in my own setup).