I've owned both. My experience:

Glock - Ugly, plastic, DA trigger (not my favorite). Accurate enough. Reliable as a shovel.

Kimber - Pretty, Steel (mostly), SA trigger (quite nice actually). Very accurate. JAM-O-MATIC. Horrible service. Horribly overpriced. I'll never own another (pistol or rifle).

-nosualc

ps - For those of you who own Kimbers and think they're the best ever? Good for you! I'm happy for you, but that was not my experience.