I have both a Kimber Eclipse Pro and a Commander sized Smith 1911Sc. They are both very reliable. If you want lightweight and easy of carry, I would go with the Smith. Much lighter then my Kimber but I still like the heavier weight of the Kimber for comfort of shooting the heavier loads.
I carry the Federal EFMJ 200 gr +P in the Smith and they shoot very well in it.
I like the Remington Golden Saber 230 gr in the Kimber.
The Smith really shines when carried in a shoulder holster over the heavier Kimber.
I personally like the heavier Kimber to shoot, but the Smith does carry a lot easier.