OK, I've owned a bunch of 1911'a and now own two, both of which work flawlessly. The rest were spotty in performance, had parts break, etc. ALL 1911'a are semi-custom in that they need some fitting of some parts to work well as well as having a certain percentage of parts fall within certain tolerances. Nature of the beast. Off the shelf, some will run flawlessly and some will never run right. Pick a design and weight class you like and commit to it. If you go with an alloy frame, I like SA's because they have the barrel ramp. Otherwise, the aluminum frame will get gouged up and eventually become a problem. If you shoot it a lot. If you are looking for a house gun the light rail, while sacrilage to some, is a great idea.
Since you are looking at some pretty pricey 1911's, I'd go for a semi-custom from a smaller shop who will be willing to really police the QC on your pistol. Someone mentioned Nighthawk and those look nice. Plenty of other small shops who do nice work as well and are really interested in making satisfied customers. I would insist on all forged and machined parts since the original design was built around that idea.
Lots of checkering will chew your hands up unless it is pretty fine. Flattened checking is better or serrations. Also, a lot if "improvements" like guide rods and so forth are really just a hassle. The original design worked fine.