I'll echo what Cobra-6 said, design has a lot more to do with grip size than calibre alone. 1911 grips are extremely close size wise to a Browning HP and are considerably smaller than Glock grips. Just because it's a 9mm doesn't mean the grip is smaller. I have taken many people to the range shooting, including girls, and they all agree that the 1911A1 in .45 is much more comfortable to shoot than my Glocks.
I find the P225 grip to be too short, my baby finger is crammed up against the protruding base of the mag and not very comfortable to hold. I own 3 1911's, you can get them in any calibre including 9mm, 40 S&W, .45 and 10mm. You can get 8 round flush fit mags for them or 10 round mags that protrude from the bottom of the mag well slightly.
As far as the recoil of a .45 goes, I find that a 40 S&W has more snap and muzzle flip than my .45's do. Yet 40 S&W is far and away the popular choice amongst law enforcement agencies.
1911's get my vote, for a design that's coming up on it's 100th anniversary and still is extremely popular with shooters all over the world, you can't go wrong. There are even double stack 9mm versions made by Para Ordnance that have a mag capacity of 18, that's one more than a Glock 17.
And for the record, US SOCOM as well as a few other black pyjama types use .45 calibre HK Mk 23's and 1911A1's. Just because it's non-NATO doesn't mean it's cost prohibitive to use, you can't put a price on something that works.