A 19" rim is very good looking, and for the quick turns at high speed the car will turn on a dime, but there are some problems that will bother you down the road.
1) Weight: the other guys are correct. The extra weight will cause your alignment to move in one direction or the other. More Alignment jobs. Also you'll have to upgrade your suspension, or replace your stock setup quicker than the rest of us with 16-18". Also, your braking distance will increase by 5-10ft.
2) Potholes: Unfortunately, potholes will destroy your rims, and if you miss one, you're likely to destroy both Wheel and Tire--$$$$
Personally, I would go with a 17 or 18". 18's have a very good look, and use very low-profile tire.
Good luck on your decision and of course we want to see some pictures in the gallery.