My vote goes for the 3" GP100. Shoots like a 4", but carries like a smaller gun. Plus it holds 6 as opposed to 5. And with the extra weight you can shoot this thing all day long and not feel like it kicked your butt. Great vid of Hickok45 putting one through it's paces:
http://www.youtube.com/watch?v=iq3Ud...e_gdata_player