I have owned and shot a few pistols, in my opinion, TECHNICALLY SPEAKING, a revolver will always be more "reliable" than an automatic due to only one fact. Jamming.
Now that being said, Let me add that Glocks are EXTREMELY reliable pistols and I will be purchasing a Glock 20 (10mm) this January, I currently own the Ruger GP100 but, and it's a very DEFINITIVE but, if had had time to grab only one of the two, it would be, without a doubt the GLOCK. I also am in love with the Colt Combat Commander, for it has been battle proven for DECADES, and the Desert Eagle if only for the mechanical design of the weapon, is probably my favorite. But I would not, under any circumstances, carry it. I don't even own it any more actually. Hope that helps...
The EARLY bird may get the worm... But the SECOND mouse gets the cheese..!!!