matsickma,
I only have 5 other tube amps to keep the Guild Combos company:
a '75-6 Ampeg V4b bass head (with two 1970-'80 era Ampeg B-40 4x10 bass cabs),
a '90s Vox AC30 Top Boost (retro-modded back to the 1965 schematic & specs),
a '67-8 SF Princeton Rev,
a '67 BF Pro Reverb and
a '79 SF Deluxe Reverb (modded back to early Black Face voltage and specs).
Good Amp/Guitar combinations:
My '00 Bluesbird has the Seymour Duncan pickups and is a very versatile guitar. I use it with the Princeton Rev a lot, as in one set with the Guild 'bird and one set with an Ash-bodied Strat with Vintage plus pickups.
I have a '72 ES-335 that sounds good with the Princeton and the Deluxe. The guitar feeds back easily, albeit in a very controllable way. At low volume, that translates into a very lively and responsive guitar when matched with the small Fender amps.
I have a 'loaner' X170T with TV Jones Classic pickups that sounds good with everything, too!
The Ampeg bass amp sounds good with every bass I've played through it; Ken Smith 5 string bass, MIJ Fender Mustang bass, my personal '66 Starfire I bass and a MIM Fender Jazz.
I haven't used the Vox AC30TB much lately, although I should. I had new transformers made for it about 10 years ago by a small company in Dallas that used to make a lot of boutique-amp 'Iron'. The voltage was increased in the new Power Trannie, and then a great tech/amp builder in Austin did a lot of small things to change the amp back to '65 spec. Fawn-colored tolex, Celestion Blues, cool trem, all in all a great amp. Hey, will one of you younger guys please come down to Texas when I have my next gig and carry the durn thing for me? Please? I'll let you play two songs in the 3rd set!
I haven't owned the '67 Pro Rev long enough to gig/rehearse with it, so I don't have an opinion about what guitar(s) will work with it. I bought it from a friend who played almost all of his gigs with it for 40 years; maybe 2,000 gigs! He blew up the Output Trannie in '97 and had a SF Bassman OT installed. When you look inside, you can kind of see where different repairmen over the years did different things to it; one guy installed a solid-state rectifier, another replaced the OT, yet another tortured the amp with a hot solder gun, etc.
Right now, it's 'over-filtered', plus it needs a cap job. Somebody pulled four of the Ajax blue-molded tone caps off of the turret board and put in Illinois Central tone caps. A friend gave me some original Ajax caps, so we're going to get it back as close as we can to '1967 stock', then listen to it and see if we like it. My amp repair guy actually has two '67 Pro Reverbs, so we'll be able to compare mine and his. I may keep the more powerful Output Transformer in the amp, or I may change it back, we'll see!
No Kustom amps, though