While the G19 is a great piece, I would strongly encourage you to consider the G30 or G30SF (the only difference is that the SF has a smaller back strap, otherwise they're identical...use the same mags too). It's the .45 subcompact and holds 10+1 rounds. One of the nice things about this gun is that the magazines have an extension at the bottom for pinkie placement. I have always wondered why all the subcompacts don't have this great little addition because it makes such a HUGE difference. Holding the G30 is like holding a compact, but you get a smaller gun, which is easier to conceal. You can buy these extensions for other models but there are other reasons I prefer the G30/SF. You would be amazed at how easy it is to shoot and I'm a woman. The recoil is SURPRISINGLY light, so much so, that I'm now shooting one handed and from the beginning, was almost as accurate as when shooting two handed. Obviously, this didn't happen overnight, but it didn't take long to become impressively accurate. Although I grew up around guns and knew quite a bit about them, I hadn't done any shooting in years. When I first bought my G30SF, I'd go to the range at least 1-2 a month and shoot 100-150 rounds. My next step is to start shooting with my right (weak) hand. Plus the .45 is my favorite round. The slower velocity makes it great for home protection because it's LESS likely to go through walls (still possible, but less likely) and has GREAT knock down power...it'll make a HUGE hole in whoever takes the round! I've been told by many that the 9mm is the bare minimum one should use for home/self defense. You could also consider the G23 (.40 cal. compact, 13+1 rounds) or the G27 (.40 cal subcompact, 9+1 rounds...but with the G27 you'd probably want to get an extender for your mags). However, with both the 9mm and the .40 cal, you're dealing with higher velocities, which means the rounds are MORE likely to overpenetrate (go through the bad guy/girl and through the wall behind him/her). My understanding of ballistics is rudimentary, but this is what I've been told and read about...please correct me if any of this information is incorrect. Stay away from the .357 sig compacts or subcompacts. They don't call them pocket rockets for nothing!!!!!!
Go to the glock web site and check it out for yourself
GLOCK | Perfection , you have to drag your mouse over the left side of the screen until you see North America. Click on it, then click on products, then double click over pistols and you can view them all together. Click on a gun and it will give you all the specs for that model (bottom of the screen). Just my 2 cents.