Shamster,
I concur with the opinion that it's where you hit them that counts the most.
Once upon a time, I was heavily into the this caliber versus that caliber debate, but then I began to teach other people how to shoot. I noticed that different gun and caliber combinations serve different peoples needs very differently. There isn't a single best caliber for everyone.
Yes, there are limits to this and I am aware of them, but if you stay within the acceptable range of power for self defense, then actually LIKING the gun/caliber you carry and having CONFIDENCE in them is more important than I can say. For me, the acceptable power floor is .38 Special +P in revolvers and 9mm Parabellum in autos. This assumes quality ammo of course.
Liking your chosen sidearm encourages pride of ownership, confidence, practice, etc. Confidence in your chosen sidearm engenders trust in the weapon, assists coolness under pressure, and improves your performance at the range.
For me, I've found I shoot the Smith & Wesson .41 Magnum revolvers better than any other caliber/gun combination. Why? Beats me! I'm not going to argue with it though as few argue with the .41 Magnum in competent hands.
With respect to the .357 SIG, I've never fired it, but the combination of SIG-Sauer and Federal Cartridge who developed the concept is excellent. I'd definitely give it a look if you are interested.
Remember, the most important aspect of handgun stopping power is shooting your chosen gun/cartridge combination well. If you find the .357 SIG shoots that way for you, stick with it and don't look back.
- Anthony