Have you considered TruGlow's TFO sights?
They have tritium in the back of them for low-light conditions, and fiber optic rods that are extremely visible in lighted environments.
They can be had for considerably less than $140, too. I'd recommend your contacting James (Nick) Nicholas at this website:
He specializes in XDs, but the site shows availability for the Kimbers as well. The install is free if you buy from him. Kimber may come only in the green front-green rear combination, but I know they come green-yellow for other models.
I purchased my TFOs through him and recommend him highly.
Here's another thread which discusses the TFOs and has some pics to give you an idea of how they look:
XD-40 service, XD-9sc, member GeorgiaCarry.Org, National Rifle Association, Gun Owners of America, North American Hunting Club, Rocky Mountain Elk Foundation
Last edited by treehugger49; 03-12-2013 at 06:55 PM.