I think the only one I was genuinely sad about letting go was my ivory one...it was a thing of beauty and it did sound great, but I do know where it is. That's said, and while of course desired tone is quite subjective, my Lull JAXT4 sounds more like I want to sound (so neither better nor worse).
I'm a little interested in the new Epiphones, but they seem to be being pushed back and back (how many months since the original leaked scrub sheet?).
If Gibson did decide to release a new Thunderbird with a two-part bridge, clover machines etc., then it would pique my interest, however they seem more concerned as a company with the continual reinvention of the Les Paul and SG whilst releasing truly appalling looking new models, when they should be doing doublecut Les Paul Jnrs with a P90 in the bridge position. We play with a lot of bands and we always discuss gear; nearly every punky band we gig with questions why Gibson are making Jnrs.