If I wasn't in CA, I would get a Colt Combat Unit 1911 in .45ACP and never look back. I think it has the best feature set for the money and is configured similarly to my SACS built Colt O1991A1.
IonBond DLC black is pretty much the best surface coating of the guns mentioned.
Novak .140" notch rear and tritium front is exactly the configuration I use, and is my favorite.
M45A1 spec railed frame.
Stainless steel frame and slide are fine.
Series 80, which I massively prefer for a fighting gun.
I'm hearing they have good factory triggers.
Slotted grip screws, so you can pull them out with a .45 case.
Colt dual recoil spring system, which is what I'm using on my O1991A1 SACS gun.
Beveled mag well without a magazine chute/MSH. Which is what I use. (With a recessed lanyard loop, which I wish the CCU had.)
25lpi checkering from factory. Which is what I got done by SACS.
Undercut trigger guard. Which I prefer.
VZ made grey G10 grips, double diamond pattern, with thumb scoop, which is nearly exactly what I use on my gun, except mine doesn't have the Colt logo and I get them in black cherry.
Colt "match" barrel, and bushing. Probably fine. Should do about 2" at 25m with good ammo.
Novak non-ambi thumb safety. Literally the same setup I use.
Lowered and flared ejection port with loaded round clearance cut, and extended ejector. Which I also use.
One thing about triggers, some of them come with the aluminum black, serrated face trigger with no overtravel screw. This would be my preferred, as I use the Harrison medium (smooth face) with no overtravel screw, so the screw can't back out, which I've seen on some guns. Other CCUs have the three hole Greider style trigger with over travel screw exposed. I wouldn't prefer that, but it's not a show stopper since everybody from Colt, to Wilson Combat uses a similar trigger.
Overall, every person I've seen post about them has been thrilled with theirs.
The finish, rail, sights, dual recoil spring system, excellent grips, excellent checkering, series 80 (I consider it an upgrade), extended safety and beavertail from factory would be enough to sell me.
At the $1,400-ish mark, it competes with the Springfield TRP, and beats the hell out of it in feature set, IMO.
It's an M45A1 with some extra features. I want one REAL bad.
If I got one, all I'd do is add an EGW flat bottom firing pin stop, 25lb mainspring, and a Wilson bulletproof extended mag catch.
So, admittedly, while I don't have direct experience with this gun (@GS5414 has experience with the 9mm Colt Combat Unit, and was/is issued a Colt M45A1), I do have direct experience with the features included on it, and it's exactly how I would spec out my own 45 rail gun.