640 with 305 Crimson Trace grips - if you will carry it on the belt like I do for my primary.
340 M&P with 405 Crimson Trace grips - if it will be carried in a belly band, pocket, or under a sport coat in a "City Slicker" shoulder rig from Ken Null (like I do for my BUG).
Hard to beat a less expensive 38+p model if you don't feel the need to go .357 magnum.
in my pocket right now... a 642...Your Favorite J-frame is...
+1 Love my 637I almost got the 642, but ultimately went with the 637 because it allows single-action as well (If I'm gonna pay that much money for a BUG, I want COMPLETE control). Now if I could only shoot it straight...:tired: