Cane likes his Colts. You are never going to get him to recommend something other than a Colt, it's who he is and we all love him for that misguided belief.
Dr. Jason, Scubie and I were in the Colt booth at SHOT last week checking out their 1911 line and "impressed" would not be the word that leapt to mind. Sorry. But it's the truth. The same can be said of several "good" 1911 makers who have a reputation in this market. Frame to slide tolerances were poor, tension on manual safeties where crap and the only triggers we found worth a damn at the whole show ( having test/dry fired about 100 models ) didn't come from "production" houses.
I had one alloy frame, steel slide pistol. It was one of the first handguns I ever "owned" even though it was actually my dad's and he "gifted" it to me when my parents divorced.
It was one of the original Beretta 92-F models in 9mm. I must have shot 15,000 rounds, maybe more, through it. Anytime I could get money for ammo, I would be at the range with it. I wanted to be as good as Martin Riggs in Lethal Weapon. Shooting smiley faces at 25 yards and stuff.
Over time I noticed a real wear on the frame from the slide. Not just the wearing of the bluing, but actual real wear on the running rails that the slide was rubbing against. I got a bit concerned, because I noticed that the wear seemed uneven to the naked eye.
I took it to a friend who was a machinist and he confirmed it by using a mic. The steel slide, rubbing back and forth, was causing uneven wear on the aluminum frame from normal shooting.
From that point forward I haven't trusted wear and tear on dissimilar metals. Period.
Now I don't know your size, but if you have been packing around a full sized steel 1911, getting a 4" or 4.25" for a carry weapon is NOT going to crimp your style if you get a good, quality leather rig and get it fit to YOU.
If it's a shoulder rig, have it professionally adjusted, don't just slap the thing on and wear it all cockeyed like every mook in every TV cop show.
If you get a belt rig, get a good belt first that can handle the weight, and get a holster that is comfortable and will keep the weapon in place.
If you want a lightweight carry gun and you want an aluminum framed weapon, more power to you. But seriously take a look at them and shoot them first.
A good range visit with rental guns will tell you a lot.