Evan,
Just thought I’d toss it out there for you. Grosh makes a beautiful instrument. His solid body guitars are pretty darn resonant unplugged, and I think this one may even be a hollow body.
Nevertheless, I understand exactly what you mean about the feel of an acoustic. I wish you success on your quest for an exceptional thinline.
Oh, I assume you’ve ruled out a Gibson Chet Atkins model? A lot cheaper than a Kirk Sand.