Hey guys, I bought a house about 6 months ago and have been looking for something for home defense. After a lot of research the reliability of a glock is too impressive to pass up. Anyway, originally i was looking into a G19 but after checking around the G23 seems like the best of the G19 with some added stopping power. Is there any noticeable difference in recoil between the 9mm and .40 glocks? And finally- do you guys recommend buying a used glock or am i better off just getting a brand new gun for the extra money? Thanks!