IMO, a trigger job is one of the best things you can do for a revolver.
I also favor bobbing the hammer and removing the SA notch, so that the gun can only be fired DA. I have found little or no difference in accuracy when shooting slow fire, between SA and DA. In DA, you just "stage" the trigger, and you get the same accuracy as shooting SA. In addition, there is the reduced risk of snagging, as you mentioned, and it eliminates the risk of a plaintiff or prosecutor claiming you cocked the hammer and accidentally pressed the "hair-trigger."
To preserve the resale value, buy an extra hammer. They're cheap. Have the DA/bobbing conversion done on one hammer, and leave the other one stock.
I have three holsters for my J-frames: a Sparks Summer Special (IWB), a Safariland scabbard (OWB), and a DeSantis Nemesis pocket holster. No thumbsnaps on anything. There are many good copies of the Summer Special, including the Galco, and the Bianchi Pistol Pocket (cut off the thumbsnap). Just be sure you get something with snaps, not a spring clip.