I now own 4 SG's ('61 Satin finish, "SG Original", Kirk Douglas SG Custom, and '61 SG Les Paul Tribute),
all are excellent guitars, with a good weight (hefty, but not LP heavy), balanced (not neck heavy),
and amazing tone and sustain. ALL have had the stock plastic nut replaced (as All my Gibson's do,
by my dealer, at time of purchase), with a bone nut. And, I will say, that I got to "cherry pick"
all my SG's, from among several, at my dealer's, at the time of purchase. You are quite right, about
some having a lot of natural resonance, and some not! I've even played some Custom Shop SG's with
more "brick" like unplugged tone. But, all mine are very resonant! You will just need to play as
many as you can, and find "your" favorite!
I didn't own, and wasn't interested in SG's, for 4 decades, because of the lack of horn tapering,
and the deeper beveling of the original SG's, that was the norm, for too many years. This past year
has seen a welcomed return, to the original style bevels, and horn tapering, so...I went "crazy" and
bought 4! (I'm not prone to that kind of "Frenzy" without just cause!) My only hope, as I've stated
here, repeatedly, is that Gibson will keep making SG's (ALL models) with those original bevels, and
horn tapers. I'd even like to see them do that, on the Epiphones, as well. If you're going to make
Gibson version guitars, in the Epiphone line, why not make them "right?!"
Other than that, I'm delighted with Gibson's latest SG offerings. Even the budget priced, SGJ has
wonderful bevels, and tapering, now. Way to go, Gibson!!
With your very specific wants, I think you'll need to either have a "one of a kind" custom made,
by the Gibson Custom shop, or an independent luthier. But that, of course, will be priced accordingly!
CB