I'm a huge 1911 fan and a lover of four Glocks (19,23, 29, 30). These two gun platforms are not mutually exclusive.... they're each wonderful in their own right. The 1911 is a .45 launcher supreme... love the gun and the caliber. But honestly, I believe that the 1911 is a gun for the 1911 *enthusiast*, it's NOT a gun for just anyone who wants a good defense weapon. Flame me for that, but I've got around 25 1911's at present and have owned another 8 or 10 that are now gone. I greatly prefer Colt 1911's over all other brands, but also have some other goodies I really like from Brown, Wilson, Kimber (pre-series II), and Springfield.
I think you should get the 19 for now and add a 1911 later. Make sure the 1911 is in .45 acp... it's a wonderful platform and caliber and very comfortable to shoot... not a brute at ALL! Colt is one of the best choices you can make in a 1911!!!! There is no point in buying a 9mm 1911 as far as I'm concerned - the 1911 is a .45 acp weapon... 10mm second. A 1911 in 9mm?... forget about it.
In the meantime, your Glock 19 will serve you supremely as a defense gun that is easy to operate, service, clean, plenty accurate for defense use, great capacity (16 rounds with std mag, 18 with a Glock 17 mag), exceptionally reliable, easy to carry & shoot, economical to buy and to shoot, potent with the right ammunition, basically a dream of a utilitarian, no-brainer purchase for a defense gun.
The Glock 19 is Glocks #1 selling pistol with the 23 close behind it. And for good reason. It's combination of ideal size (not too-big, not-too-small), great capacity, great reliability, potency with the proper ammo, light weight, economical price, huge aftermarket support is incredible. Let me assure you of this, of all the pistols you could choose, the Glock 19 is among the very highest ranking pistols in the world which are most likely to meet your needs magnificently, economically, and provide the most trouble free service there can be. It's simply a SUPERB choice for a rock-solid defense pistol.