I am a diehard S&W revoler fan, currently owning a - 617, 625 3 inch, 625 4 inch, 627 4 inch, 66 3 inch, 686 CS-1 3 inch, 610, and finally, a "9"37 9MM conversion. I've owned a couple of S&W 1911s in the past and had nothing but good experiences with them.
However, at the risk of banishment from the S&W forum, this is my "Go To/Bump in the Night" weapon. At least it begins with an "S".
It's a Springfield MC Operator 45 ACP with a BladeTech paddle holster. Other than the bolt-on Surefire X200, Tripp Research 10 rnd mag, and Crimson Trace grips, the only mods it has are a LPA adjustable rear sight and refinished slide in Gun Kote. Trigger was great from the factory at 4.5 to 5 lbs with no creep. The gun will shoot POA to the sights or laser at 7 to 10 yards all day if I do my part.
One of my daily CCW weapons is the Springfield 9MM Loaded with adjustable sights.
The gun is lightly modified with a trigger job to eliminate creep while still maintaining a 5 lb trigger pull, undercut trigger, Dawson front FO sight, GI style thumb safety, and G10 grips. I load it with Winchester Ranger 9mm 127 gr. +P+. I found I'm a better shot with 9MM than 45 ACP when using only iron sights - figured a hit with a smaller bullet is better than a near miss with a big one.
Much as I love and practice with my S&W wheelguns, I've found I'm much more accurate with the 1911, especially in 9MM. The other thing I'll add is Springfield seems to have a great rep when it comes to customer service. I sent them, at their expense, a 10 year old 1911 that started having feed problems when shooting hollow points. As far as I could tell, I was at least the third owner. I got the gun back a week and a half later fixed at no cost to myself. Since then, the gun has fed and loaded every factory and reloaded hollow point and wad cutter that I could stuff in the magazine without a problem.
If you can get an S&W 9MM 1911 Pro for $900, I'd say go for it. I don't think you'll be disappointed. But from with I can tell looking at the web, you can also pick up a Springer 1911 MC Operator in 45 ACP for about the same price, or a Loaded 9MM for less. Either way, Springfield or S&W, I don't think you'll be disappointed.
However, don't forget to practice with something like one of these - it may make you a better 1911 shooter. It sure helps me.
Of course, this advice is worth exactly what you paid for it.
Good luck with whatever you choose,
Pete