Hi tristan!
I'm going to say DMU because I'm going to go there, and I really like what I hear so far. I didn't apply to KCOM, so my opinion is kind of biased, but it seems like a great school as well. I wasn't too keen on Kirksville's location, though, and yeah, Des Moines doesn't sound too hot for some people either, but I think I'll like it. It seems to me that both schools are pretty similar, with long histories, and a big emphasis on OMM. Whichever you choose, you'll be getting a quality education. Check out the DMU 2007 thread, because some current students have posted there, and they have shared their experiences, which you can factor into your decision. Do the same for the KCOM threads.
Best of Luck!