You'll never regret the purchase of either a 442 or a 642, though you'd probably regret the Taurus later when you realized that the Smith is a much better respected snubbie . . . and resale prices prove it when you step up later.
The SP101 is a nice revolver too, but it is heavier and bulkier . . . and what good is a CCW gun when you didn't have it on you when trouble surprises you like a stray lightning bolt in the dead sleep of night?
Get the Airweight snubbie . . . it is a gun you can carry "always."
IT HAPPENED TO ME TODAY . . .
I forgot my Airweight was in my pocket when I entered church. Getting ready to slide my keys in my pocket, I felt the Airweight Smith. Oops, it is illegal to carry in church in my state.
"Honey, I forgot something in the car, I'll be right back!"
Yep, a gun that you even forget is in your front pocket is a gun you will "always" have when you need it! It might buy me the time to fight towards the shotgun, AR or one of my larger caliber handguns . . . not that I think the little Smith won't do the job well!!!