My S&W 65LS has been my home defense gun and will be my primary carry gun when I move to a carry state (when I carry a revolver as my main gun, probably shared about 50/50 with a CZ of some stripe). A 3" K-frame seems just about the perfect size for an only, or primary, revolver: long enough sight radius for most people to be accurate, concealable, light enough for comfortable carry, heavy enough for shooting comfort, etc. However, I suspect that when I get my grubby paws on the 6" S&W 586 that I got on Auction Arms that it will probably become my home defense gun (though I think it won't be my carry gun when I get to a carry state, except maybe when camping).