Something appropriate for most people to conceal carry makes a big difference in choice. The Ruger SP-101 is about as big and heavy as I could stand. The LCR's are popular. The grip is a tad large, but that makes shooting them more comfortable. But I prefer the lite S&W and Rugers. I carry a S&W M442 (blue version of 642) and have been pleased with it. I don't see much need for 357 in such a small light revolver. I would call that pain. But many do buy the 357 version and carry 38 spl's just for the potential flexibility. I wonder what flexibility does one want really?
I much prefer to shoot a full sized revolver in 357 mag. It will also be more pleasant to shoot by others who might not be as able to deal with the recoil. The GP-100 is too large for most to carry concealed.
I have a carry unit made for full sized pistols