Will this be your first handgun?
If you are looking for a home defense/ IDPA gun I would go with the M&P from the choices you listed. You can shoot it in stock service pistol. I htink the pro model would be enhanced service pistol. If you were looking to shoot IPSC I can't comment on the classes as I have never shot it. I can't comment on the SR9 but I have read good things about it and tired to get one awhile back but none were in stock. I also really like the Beretta 92 and if you were not thinking about the shooting sports I would recommend it. The SA/DA pull gives some people issues as you have to learn two different pulls. For home defense and idpa the standard M&P would be tough to beat. It's not impossible to conceal either. A G17 ro G19 would also be great choices but you didn't list them. I like the grip of the M&P better than the glocks though.Well, mostly home defense,
I would carry it... maybe.. once in a while... but I'm pretty sure I can conceal a 92FS so long as I'm not sitting a whole lot. I do plan on getting something slightly smaller for a carry piece later on. This gun is mostly focused on home defense and potentially action shooting sports at some point in the future.
I would take a 92 over a storm for the reasons you listed. The track record for the 92 is so impressive (plus bruce willis used on in die hard haha). If you want a manual safety the M&P pro is out (I think). See it's getting narrowed down. Where do you shoot?I removed Glock from my list because at the moment I'm stuck on "must have manual safety". My wife and I talked about it and we both seemed to agree it was a good idea. At least then I can either leave it on or off depending on the situation.
Thank you for your perspective on the models I listed. I am particularly fond of the M&P for a lot of reasons. I hear it has a nice terigger, is very acurate, and it has a huge after-market available. The 92 is legendary, looks awesome and has passed the test of time. The Px4 seems to be an "updated" Beretta. It would be even more interesting if it were striker/safe-action.
Its too hard to pick!!