Here's the question:
Have you owned a Glock? Have you switched from the Glock to the M&P? If so, why? Is there something about the Glock in particular you didn't like?
I'm considering buying a Gen 3 G19 (can't get a Gen 4 in CA) because I think it's the best middle of the road Glock. Still, if there is a particular flaw, I'd like to know about it.
Like you, we have lots of students with Glocks and for me that alone is a reason to get one to build proficiency.
Now the back-story:
The second handgun I purchased after turning 21 was a Glock 23. It was 100% reliable and I liked it...Until I started really shooting 1911s (A Para P-13LTD was my first handgun and it's lack of reliability caused a slow progression back to the 1911 platform). I began competing with 1911s and ended up owning several. I was also using the 1911 almost exclusively in tactical training classes.
When I was hired by my department the issue handgun was the Beretta 92FS. Needless to say, being a "1911 guy" I was NOT happy. I grew to love that big heavy thing and to this day it's one of my favorite handguns. I sold the Glock and slowly sold all but one of my 1911s because we couldn't carry them. In 2009 I bought a Glock 17. I really wanted a 19 but the store was out of stock and I was impulsive and impatient, so I picked up the Glock 17. I hated it. It was unreliable and I couldn't hit a damn thing. I traded it to the local gun shop for...A Beretta .25 Jetfire. (I bought it as a fun gun and to practice making pocket holsters). I had no regrets.
Fast forward a few years and I'm a firearms instructor for my department. We train several agencies on Glocks and while nothing is perfect they work very well...So I purchased a NIB Glock 19 from one of my fellow instructors and now I'm hooked! The 19 is to me the ideal compromise size. It is big enough for duty or as a military sidearm, small enough to conceal, holds 15+ rounds in the magazine, and is utterly reliable. I replaced the horrible factory plastic sights with a set of Defoor Tactical (all black) sights and other than that it's stock. If I could only have one gun for ever and ever it would be a toss up between the Glock 19 and a 1911...The Glock would probably win.
I like 1911s, and M&Ps, and Glocks, and Berettas, and S&W 3rd Gens, etc...
I think the M&P trigger sucks compared to Glock out of the box, but can be made very good, and maybe even better.
I think you will find that if you're really used to the 1911 the Glock will be hard to run the trigger well and you may get frustrated (I did back when I was shooting 1911s). Now that I've shot M&Ps a lot, the Glock seems to me to be an improvement and I'm very happy with the accuracy.
Funny enough, while a couple of years ago I'd say it would never happen, it seems Glocks AND 1911s just might be an option in the near future. I will be broke. Very....very....broke.