Colt Python if you can afford it. They don't make them anymore but you can find them used for about 650-100 bucks. It is considered by many experts to be the best .357 revolver ever made.
I love the Smith and Wesson model 19 as well. You should be able to find one used for 300 bucks or less.
As for new revolvers, the ruger GP amd SP series seems to be alot of gun for a cheap price. Don't over look taurus revolvers too.
You are a smart man choosing a revolver for defense!