The 10mm is a great round. It is not going anywhere. Granted it's not the most popular round out there but it has a big enough cult following that it is here to stay.
http://www.doubletapammo.com/php/catalog/index.phpmakes excellent 10mm ammo going from mild to wild. Of course if you reload there is tons of brass and bullets to choose from and loading data.
I have never shot a Kimber 10mm but have always liked the Colt Delta Elite and Glock 20. I'm sure the Kimber would be nice gun.