About 13 or 14 years ago, I bought a S&W Performance Center 640 Carry Comp. Over the years, I installed Spegal Boot grips, had an XS Big Dot tritium sight installed on it, and I had the cylinder beveled by S&W.
The 640 Carry Comp is all-stainless, rated for .38+P, and has S&W's proprietary "Power Port" compensator. It's an easy gun to carry and to shoot well, light enough that it doesn't bother me to carry it, heavy enough to absorb the recoil of a +P load.
These come up for sale from time to time, and I would highly recommend it over any other contemporary small-framed revolver.
In the LCR, Ruger has created a technological marvel, but I don't really see it as a true rival to the J-frame....