I currently only have 3 mags for my Glock 23, they are all 10 rounds, since I bought it back in 2003. I wanna purchase more mags, would you fellas recommend I continue with 10 rounders, or start now with 13 rounders? I might be being trivial here, but it's nice being able to keep up with how much ammo I have left during shooting with the 10 rounders. The extra 3 rounds per mag would require more math, and that sux!!!!!!!!!