Okay, I didn't respond earlier because I was pretty sure from your original post you had already settled on a 9mm semi-auto - and there's certainly nothing wrong with that if it fits your needs and wants. All of the three you cited in your OP are well made, quality guns and the Glock you chose should serve you well.
That said, I have to take exception to a couple of things. If you think revolvers can't be customized you should take a look at a S&W Model 10 before and after it was turned into an all out competition gun for the old PPC course.
As far as recoil goes, if you're talking factory ammo fired in comparably sized guns the recoil of the .357 is the heaviest, most .38 special loads are the lightest, and the 9mm falls somewhere in the area of a "high-range" .38 load.
BTW my recommendation for a first handgun is a quality double action revolver chambered in .22 LR. Nothing is cheaper to shoot, and if you master both the single action and double action trigger pulls you'll be able to shoot good with whatever action type you choose down the road, whether it's revolver or semi-auto.
Just my 2 cents.