The more I think about it... the Glock 23 is the smartest choice in the Glock line-up for a CCW. Just the right combination of size, capacity, caliber. I believe strongly in high capacity, but I also like the more potent calibers... that's where the 23 really shines. Standard mag gives you 14-rounds on board without a reload and .40 is a reasonably effective handgun caliber.
I've got a 19, 23, 29, and 30 and if I could only have ONE Glock for all-around defense use, I would make it the G23 for sure!
When I pack my G23 it's in the 14-round capacity. When around the house, I pop a 15-round G22 mag in for capacity of 16-rounds. Such a fine, fine gun... my idea of the perfect all-around defense gun.