I'm not sure how they compare in price to Kimber, but I have two 4" 1911s from STI that I use for carry and both are offered in .45 ACP. The Guardian is my primary and I have a Ranger that I also use occasionally. Both are excellent, dependable, and accurate. They run around $1000-$1100. If you've not handled an STI you will be impressed.
STI-Eagle(2)/Trojan(2)/Edge/Guardian/VIP/Rogue/Ranger III/Sentinel/Tactical 4.0/Escort; Remington Rand-1911A1; Ruger Redhawk/Blackhawk; Sig P238