If I'm looking for a personal protection Glock what should I go with?
I love the 1911, I think I would like something smaller for CC.
Glock 19 OR 23 is a great choice. Just depends on your caliber preference. The G30 is NOT in the same category as this. The grip circumference is significantly larger. Not as comfortable in the hand - even the SF models.
I own a 21sf (same circumference as a 30sf) and find it just a bit large. I CC a G36 and find the grip a bit small, but it's nice and small for deep concealment.
The Glock 19/23 carries virtually as easily as the 36, but with the best grip fit (for me) and it carries 9 more rounds than the 36.
Small enough for a CCW but with a decent sight radius. Has a full grip for all your fingers without the need for pinkie extensions. And can use the 17 and 33 round magazines (9mm) if need be.
If you can own only one model, the 19/23 platform cannot be beat!