I used to own a Kimber Pro-Carry. I had it for about a year and a half. Total round count wasn't very high at all. It was around 1500 before I sold it. The feed ramp was chewed up, and JHP feeding was inconsistent. I think this problem can be fixed by coating the feedramp with hard chrome or hard anodizing, if it doesn't already come with it from the factory.
I purchased an all-steel Kimber Custom 5" a month ago, and have had absolutely no problems since. I put a little more 1000 rounds through it, and the gun worked flawlessly. Not one single malfunction, failure to fire, failure to extract..nada, zip, nothing. In all 1000 rounds, I squeezed the trigger, the gun went boom, and each case fell far to the right. In addition, the feedramp is unmarred, and in perfect condition. I couldn't be happier. I was considering getting a reliability job done on this, but I thought to myself, "Why mess with something that works perfectly?"
-Jim