I'd love to get one of Uberti's S&W Russian models some day. Probably in 45 Colt, since I really don't need to tool up for another cartridge to reload. (I wonder if the extractor has issues with that small rim, though).
The Remington Outlaw model catches my eye too.
I've considered a .357 magnum, but I would primarily be shooting .38 target loads and I don't know how far off the sights would be.