I carry a Kimber Tactical Ultra - love it. It shoots real nice and feels right in my hands. The Ultras all have alloy frames which makes them lighter, but it's still heavier than the plastic guns of the same dimensions. But you can never go wrong with a 1911-based firearm. Mags are 7 round versus some of the other small size 1911's using 6-round mags.

If you have the money, you could also consider the Wilson Combat "Bill Wilson Carry Pistol" http://www.wilsoncombat.com/p_bwc.htm