Well, the odds of a revolver malfunctioning are close to none, so given the odds you might be better off with a revolver. But if you are depending on a sidearm for self-defense, I would want one that I could also shoot accurately. Personally, I shoot my 9mm and .45 ACP much more accurate than my .357 revolver.
Porting only reduces muzzle flip which is a good thing, but you also lose a bit of muzzle velocity with ported barrels.
It's really six of one and half dozen of the other.
Your suffering will be legendary, even in HELL!!
--- PinHead, HellRaiser 2