Thanks for all your helpful advice. I finally settled on figured koa on a AA grade rosewood body. Placed the order today with Jim at Guitar Rodeo -- great guy to work with, bought a BTO GS from him.
It should be a nice sitting-down-in-the-living-room guitar at the GA size. I used to have a 514-C, which was that size, but I sold it to finance the GS. I love the GS, but wanted to try a short-scale, smaller body, thus the new BTO.
The only fancy appointments will be the koa binding and small diamond fret markers. Otherwise, it'll be a pretty classic-looking gloss rosewood/spruce GA -- no cutaway, no electronics, no wedge, no pickguard, ebony headstock.