i just recently got a 638 airweight for edc. it is my first smith revolver in years. i've had several in the past but like a fool i had gotten rid of all of them along the way. i got to say the little airweight has reminded me of how fun revolvers can be to shoot. so i have been bitten by the revolver bug again and plan on starting to build up my revolver collection again. i guess the question is, what would be a short list of "got to have" models that would be in any respectable s&w revolver collection?