The least expensive way to get to where you are headed, Mason, is to buy a SF FEnder REverb amp. I prefer the very early SF's....mainly becasue of the cabs. I prefer the 'floating' bffleboard/grilleboard combination compared to the glued-in baffle with the VElcro-attached grille board....from Apr '67 through 1970, IIRC. OF course, the big BF Reverb amps are a bargain in the market right now...and are not much more expensive than the SF amps.
I amthinking that you would love a Twin Reverb. Big sounds twangy cleans. You already have the singing tweed thing sewed up.
JustinV wrote: "Would it be a good generalization to say jazz and country amps have much more in common than country and rock amps do?"
Imo, all tpes of music need guitar amps that are tube based....so that is one similarity common to jazz, country and rock...and alternative and folk and whatever else is playing. (;^)...just my opinion, though. I don't like to hear country or jazz through SS guitar amps. Tube cleans are different from SS cleans...just as the distortion in each is different. YMMV