First off, excellent choice
Here is some great reasons to choose the G23. Hope it makes your choice easier.
1. Glock reliability
2. Can be used for both CCW or home defense
3. Easy to clean and easy maintenance
4. Can find parts anywhere for repairs or upgrades
Thats a few i can think of off the top of my head. Im sure theres more but this should help. Keep us updated, would love to know what you decided on
P.S. as far as price, $600 is a little much but, different cities different prices. $550 is the most i found.