RE: Taurus 605CHB or Smith 640?
CB, all of the above mentioned ones will serve you just fine. One thing to keep in mind about the small 357s is, "follow-up" shots will be tougher with that kind of recoil. I'd probably go with a 649 S&W.(Bodyguard) or the Ruger SP101 in 38 Special. Both are DA, stainless, and can handle +P loads. If you are considering an "air-weight" pistol and plan on shooting +P loads, make sure that it can handle it. Most of the newer ones will have "38 Special +P" stamped on the barrel. As with any gun purchase, do your homework and go with what "fits" you the best. Good luck and happy early B-Day.