A more direct comparison would be the MC Operator to the Desert Warrior as the MC Operator has a steel frame instead of aluminum. Both are good guns, in my experience the Springfields tend to run better from the factory, are better fit and have a more durable finish. The finish on the Kimbers I've seen chips around the ejection port early on. I'm able to get a higher hold with the Springer than I am with the Kimber due to the beavertail safety shape. If I were to buy one or the other I'd pic the Springer hands down.
Also, the X300 is the way to go. I've got an X200 and Surefire will bend over backwards should you have any warranty issues. They are well worth the extra cost.