Hey, I have three Kimbers and I love them all, and haven't had a spec of problems with any of them. Two are series 1 guns and the other is a series II gun, all with internal extractors. I also have six colt 1911's with internal extractors and have never had an extraction (or any other problem with any of them. I have an S&W M39, and a M52 with external extractors, and haven't had any problems with either of them either. So its not that I don't like external extractors, I just don't like Kimbers. They use four parts to replace one. What sense does that make.
I know Kimber does a pretty good job of standing by their guns, and the guys I know who have had problems with Kimber's extractors have sent them back and had them fixed (sometimes more than once). I'm just saying, there are a lot of good 1911's out there, and there are always deals to be found, so personally, I'd pass on any Kimber with an external extractor. Sure it can be fixed, if there is a problem but why take the risk and go through the hassel.