I really appreciate all the insight y'all are sharing with me, thanks so much!
Today I made a first serious foray into hollowbody shopping, ending up spending nearly 2 hours in my favorite local guitar store.
Below is a rundown of all my impressions from the guitar I tried but first I'll get to the main takeaways:
1) Ibanez AMH90 is off the list.
2) G2420 is just about off the list, can't decide if I want to find another example to try or not.
3) A guitar I wasn't even planning to look at, Ibanez AF95FM, suited me much better than those two.
Details...
First off I compared one of the two G2420's they had in stock against the Ibanez AMH90, although I was already having second thoughts as soon as I saw just how much smaller and especially shallower the body of the Ibanez was. Tried it first, very comfy to hold and play, neck and fretboard suited me, it was set up well and the frets were well finished...could not get anything than a generic, humbucker-y "electric guitar" sound of it to save my life. I'd much rather stick to playing my Strat and Tele than get another guitar that doesn't feel or sound like my concept of "hollowbody".
The G2420 on the neck pickup, I quickly found some settings on the switches and knobs that sounded pretty good. Definitely had an unfamiliar characteristic to the tone, not like playing my solid bodies. But the middle or bridge pickup settings were just bad. A little bright (which was hard to correct with the Tone knob) but mostly just plunky/twangy sounding. By which I mean, for someone who know what they were doing I think they could get that twangy-Gretsch thing going but for me it just came across as plunky, too sharp on the attack and not enough sustain. Like trying to play clean on a Tele bridge pickup.
I went and got the second G2420 (actually a G2420T) and I thought the neck sounded better than the first one but the middle and bridge sounds were exactly as before. And the whole Bigsby thing felt and looked Rube Goldberg-ish to me. Plus every time I as much as touched it for a subtle vibrato I would have to retune 2-3 strings.
Honestly, I lost the plot a little by the one-hour mark. I think there were one or maybe two other guitars I bought but nothing that changed my growing suspicion that the whole hollowbody thing was a boondoggle for me. They just seemed like either an elaborate way to end up with Tele-like sounds or else I don't know what I'm doing and ought to leave them to better players!
I almost went home at that point but I couldn't resist pulling down what I thought was the best looking guitar in their entire Gretsch/Ibanez inventory. It was an AF95FM, in the Antique Yellow finish that I'd seen in photos and found quite unimpressive. In person, it was gorgeous.
More importantly, I tuned it up, plugged it in, did a little perfunctory noodling around (not expecting to like it, by that point in the day) and started getting interested. On the neck pickup, other than a tendency to get a little too loud when I strummed it (which could be tamed by slightly backing off the Volume and Tone) it was everything the G2420 neck pickup had plus a distinctly rounder decay to each note. Very full. And the middle and bridge settings were actually useful. Really bright sounding unless I backed off the Tone but not quacky or plunky or even twangy. More like a singing bright voice, the kind of fat tone it's sometimes hard to get without a lot of gain on a solidbody guitar.
So I was pooped and a little shell shocked by that point. Maybe my sit-up-and-notice reaction to the AF95FM was wishful thinking. I need to go try it again with fresh ears and fingers. One thing I did notice was the setup needed attention. Neck relief was fine, fretworked looked nice and the action was about right (just under 0.070") on the high strings. But down on the low-E and A the action was on the high side of 0.090" which is too high for me, especially with the 10-52 heavy-bottom gauge on there.
More importantly, and probably related to the high action, the intonation was off. At that 12th fret the high strings were slightly sharp (compared to the harmonic) and the wound strings were seriously, easily audibly sharp anywhere above the 9th or 10th fret. So I need to go back and ask their tech to do a setup and maybe put fresh strings on there so I can give it a better tryout.