Don't have mine with me, so I had to pull from the Kimber and Wilson spec sheets.
I'm partial to the 10-rounders, and my choices were the KZ 45c and the Kimber UT II. I know there are detractors concerned about short-barrel velocities, but I wanted the smallest-sized auto with the biggest punch in its' size class. The KZ Compact weighs 35 oz empty, and the UT II is spec'd at 24 oz. (that's twenty-four!) unloaded (no 'loaded' specs). For such a small gun, it handles very well; not unlike an HK USP 45c, and as much badmouthing as it got during its' initial sales, mine has been flawless.
Rather than fumbling in a fanny pack for a cocked and locked conventional M1911 pistol (of any size) I'd rather fumble for the Para Ordnance LDA (or several other designs).
Drawing from a holster is easy to drop the safety to FIRE on a standard M1911, but not so when you're feeling around for it. In addition the short trigger pull of the M1911 can be a liability here.
The Para Ordnance LDA system only requires you to find the trigger. The LDA grip safety locks the hammer (rather than the trigger on a M1911) so you can leave it OFF. The SIG P220 dispenses with all manual safeties other than your finger..
You can get your choice of cocked and locked/safe or DA first shot with the HK USP 45 Compact, Taurus M945 (a highly underrated pistol), and Taurus M145 among others.
Holster draw I'm confortable cocked and locked. Fumble draw..... not!
They don't make 'em anymore, but you can still find them for sale -- Star PD. 4" bbl, aluminum frame, same size as Colt's Officer's model. I don't remember the weight, but it's not much heavier than my 442 Airweight.
I'm not sure about the loaded weight of my Ultra CDP II with 8 rounds, but it's pretty darn light (advertised weight unloaded is 25oz). The frame is aluminum. Use the regular 6 round commander mags and you'll save a bit more weight and the mags will fit flush in the well.