For about 3 weeks I carried a S&W M28 in a shoulder holster, hated the thing and stopped using it.
Fianlly tried one of the models by Safariland or Bianchi (too many years since I borrowed the rig) it was okay.
Choose from the better makers, Galco used to make a good looking one.
As for grips, what do you have and waht don't you like about them?