I am thinking of trading my 30 for a new gen4 19 or 23 for a few reasons. I also think I can trade or cover most of the cost with trade because I get the LEO/Military discount. 1. I've noticed the 30 is pretty thick and I prefer OWB carry and it is warming up where I am so its getting much harder to conceal. 2. Ammo doesn't break the bank but its not cheap either compared to 9mm more so than the .40S&W. 3. Not that it is a major factor but more rounds in the magazine is always nice. 4. With cheaper ammo I can shoot more and become more proficient. I am leaning more towards the 23 because I can change the barrel to a 9mm but I'd also have to get new mags anyway so I go right back to thinking the 19 will be better if I have to buy a barrel and at least 3 mags anyway. I'm stuck and can't make up my mind and I'd like outside thinking for this.