G26 or G27?
Longshot,
Like so many have said it's going to be a personal choice. Definitely try both before you buy!
I had a G27 and carried it for a bit over a year. I liked it, but my reaction to the recoil varied. Sometimes no problem, other times like cold weather my hand was too sensitive.
Vertical "stringing" was the problem that caused me to trade it off. At 30 feet my horizontal spread was about 2" to 3", on a good day vertical spread was about 3" to 6", but on some days it was more like 1' to 2'.
I now have a G17 and a G26, carry the G26 a lot and am pleased with the consistency with which I can shoot it. I do some handgun instruction and when asked by a student to "demonstrate" a course of fire I often do it with the G26 rather than the longer pistol my student is using. (I try to avoid shooting while teaching because I want my students to concentrate on what THEY are doing.)
.40 in some other guns can be much easier to handle. I just picked up a S&W 4013 with night sights originally made under contract for the Colorado State Patrol. Matte satin aluminum frame and blued steel slide, safety lever is decocker only (Many LEO agencies prefer no manual safety to be forgotten under stress) and this pistol is superb. Despite the light weight, recoil feels much like 9mm; this may become my primary carry gun.
But the G26 will still have a very definite choice spot in my lifestyle because it's size makes it a superbly easy to carry piece of hardware during the summer "tee shirt 'n shorts" season.
"I Glock...Therefore I am..."