There are a couple of points that I have tried to make that I am not sure have come through.
I believe the S&Ws to be very well made and very very nice guns. There is absolutely nothing wrong with them and for the money and the availability (in mass) probably the best deal going. The fact that the factory is local is certainly an upside as far as service.
The Rock Islands (no first hand shooting experience) are well made, pretty faithful interpretations of the orig 1911s. They are also the best bang for the buck out there as far as price.
There are tons of other 1911s out there. Far too many to list as 1911s are have essentially become a cottage industry of low, middle and high end models all tweaked in some way to differentiate them from one another. Carry models, race guns, shortened, lengthened, high cap, double action, etc. Kimber, Les Baer, Wilson, caspian, Bul, Essex, enterprise, Norinco, etc, etc....
To go along with this there are billions of after market parts to further tweak your gun to what that individual wants.
If the owner wants to do their own work, has the knowledge of fitting, grinding and polishing, or if they intend to never alter the gun then any of the above off will probably serve them extremely well as there are very few crappy guns out there. But, 50% of the fun of a 1911 (like a Harley) is tweaking and adding doo dads.
A look at and a call to any of the parts catalogs/ manfucturers and a few smiths can be enlightening. Some smiths will flat out not work on certain makers for any number of reasons (even some of the nicer/ higher end guns). Determining if a certain part will work in the Brand X gun, can be a crap shoot. A person could find out that the 100% milspec 1911 isn't so 100% milspec. The response is generally something along the line of "sure it's a 100% milspec, but, we tweaked it and improved it so, certain parts might require a bit of fitting".
Boiling it down... The overwhelming ammount parts out there are all made to fit Colts. If you call the parts comapny and ask them, will this work in my Colt Series 80? They will say yes. And if it does not send it back and get your money back. If you ask a gunsmith to install a new sight, beavertail, extractor, etc. on your Series 70 they will say, Sure! drop it off on tuesday.
The final point. as much as I buy a gun thinking that I am going to keep it, treasure it and shoot it forever, things change. A few years down the road should a person decide to sell or trade off a 1911, the Colt will always be desirable to a wider audience. To a dealer/ seller they don't have to explain to a person that may have never heard of (fill in name here) how and why it is that much better than the Colt. Colt is the standard that all others are compared to. It very well may not the best out there but, there really is no way you can talk about 1911 without Colt being part of the mix.