Hello:
I've got a 17, 34, 26, 23, and 30 (all Gen Threes), and I've found myself really liking this G23 and have been carrying it since April. Usually carry a old model Smith 60 .38 snub (1970's) or an LCP as a backup.
Have always been a .45 fan but this 23 is just perfect for me; carry a spare G22 mag. I can carry it in the hot summer with shorts and shirt.
The G30 is a great gun but I've found it just a little heavy although I will carry it in winter with a Looper pancake holster.
I do all my "heavy" shooting, range work, hunting, target practice with the 34 and even predator hunt with it in the winter. Coyotes with a Glock 34 and AK 47 are a blast.
I've found that just the fact of shooting a lot has improved my performance on even the other calibers. Have fired a little over 5,000 rounds this year.
The 34 has Dawson Precision sights on it and the front sight was selected to give me a "dead on" hit at 50 yards. I'm bout 1.5 inches high at 25.
Man I love these glocks.