My 2cents on ABG's (owned a black Applause in '96)
flatwounds help, especially with the short-scale ABG
reasonably higher action helps
soundhole plug for higher volumes amplified
even so, the bodies of ABG's are physically too small to produce low fundamentals, which makes these guitars a fun example of "psychoacoustics". We are not hearing the low notes. Our brains are interpolating them. Isn't science fun?
My other 2cents:
Breedlove Atlas is a new contender for the Thunderchief. The Atlas has a cedar top and is warm-toned. Around $600.
The M. Kelly maple lam. top basses (dragonfly) sound pathetic acoustically. But they too have a new cedar-top model.
Ebay, the Guild B-30 or B-50. Better fundamentals with the 6" deep bodies.
If you just want to jam acoustically, go upright. It's not as hard as some would say. Though you may bleed some, at first.