Currahee
I agree with your idea of a gun collection. I have a "collection" of approximately the same size. I have no heirloom guns in that I shoot everything that I own and try to train with them as much as possible. All of my guns however are of a quality that I hope to be able to hand down to my kids some day and for them to use the same way I do. Hopefully I will wear a number of these out and will replace them(or rebuild them) long before that time comes however. This STI is not meant to be a race gun, but instead my go to "duty" gun. Logistics for what I own was one of the biggest factors (access to mags, etc) but became less of an issue when I really looked at what the guys I train with shoot ( a few Glocks, few M&Ps, Sig 226,92fs,HK and a couple of 1911s). It was a major factor in deciding to go with a gun chambered in 9mm. Reliability and durability are my 2 biggest factors Some of my guns are more expensive than many would consider for a "duty" of heavy use gun, but that is not how I treat mine. All are tools and are meant to be used as such. It is a balance of how much resource to commit when other items such as you mentioned (spare nods , foodstuffs, comms, etc) need to be considered. If it is between getting more training or a new gun, training should always come first. It is the same balance that has to be considered when buying a set of NODS or a IR Laser or a quality Optic or an AR....or any other piece of kit.
I would not suggest that it is the way to go for everyone, but if you like the 1911 style platform and are looking for higher capacity it may be something to consider. I'll add more to this review as I get more time on the gun. It may help someone to decide one way or the other.
I did run another 350 rds through today during a day of drills. One significant thing I am happy about with the STI is recoil mitigation. Not that 9mm has punishing recoil by any standard, but the felt recoil on the STI feels quite literally half of what I have with my M&P. This leads to faster more accurate follow up shots. It was noticeable on multi target sets.