Thanks to everybody for your advice. I am sure they would all sound great. But I had to pick just one so I went with Jaybo's advice (even though I'd mostly been thinking of an LOMC) and just took delivery of an AT150MLX today and mounted it on an LPgear Zupreme headshell that I ordered with it.
Dang! It's not even broken in yet and sounds wonderful. I'm breaking it in on some 45rpm 12" records. It has both a lushness to the sound and yet more resolution, more air, more separation, more delineation, not just in soundstage, but in timbres.
On "A Meeting by the River," with my previous cartridge I could tell when playing slide, VM Bhatt's guitar had a fuller, richer sound than Ry's thinner-sounding slide technique. But with the new cartridge, Bhatt sounds even richer and Cooder sounds tinnier. More differentiation while maintaining a cohesive whole. It's fast, too, and will probably get faster yet when it breaks in. The sound of the tablas on this combo is to die for.
Thanks again, everybody, and special thanks to Jaybo for speaking up for a MM cart!