I have 4 Sigs (P230, P226(40), P228(9) and P220(45)) and three Kimbers.
The Sigs are extremely reliable. The P228 is a sweet gun.
For starting out, 9mm ammo will be a lot more affordable than 40 or 45.
I will not buy another Kimber. My first Kimber was bought in 1997. It's been a good, reliable gun. My last one was bought a year ago. It's taken me a year to get it to function reliably. Kimber quality control is hit and miss. Maybe 70 or 80% are problem free. However, a lot of people who say that there Kimber has never given them a problem have also never fired anything but range ammo in their gun. My Kimber handled my reloads perfectly fine. But premium defense ammo has been a serious problem. Do you want a gun just for shooting at the range, or do you want something that is reliable for self defense?
That being said, I shoot a single action gun better than I do a traditional SA/DA gun.
If you really want to go the 1911 route, I suggest you avoid Kimber. Rock Island and Springfield are better choices. Dan Wesson is excellent but twice the price.