i carry a springfield emp in 9mm. you get an officer's frame 1911 sized gun, RELIABILITY, high build quality, night sights, and 3 mags (mags hold 9 rounds) with your emp. they're around 1000 but worth it.
aluminum officer's frame 1911's in 45 are pretty blasty, and followup shots are thus slow. also, 45 loses a LOT of velocity with a small barrel. on the other hand, the emp in 9mm has low recoil, followup shots are quick, and 9mm doesn't suffer as much with the shorter barrel. in short, if you shoot an emp, you quickly realize that 9mm is the proper cartridge for a small 1911.
the emp is a gun that's truly more than the sum of its parts if you shoot one.
fwiw, i paid ~ $1200 for mine. i ordered it from dawson precision, and that extra $200 paid for them to swap in a single sided safety, and go through the entire pistol (trigger job, polish breach face, polish feed ramp, tune extractor, etc). it has been 100% reliable from the first shot, and the trigger breaks like a glass rod at 3lbs.
plus it's a springfield, so you get a lifetime warranty that they will actually honor. i can't imagine buying a kimber over a springfield for this reason.