There is NO best...that any one of us can pick for you. There are so many sizes and weights, they all balance differently, and a really helpful gun store will allow you to try on a holster and walk around with the gun to see how it feels to carry. The choice of a carry gun is intensely personal and you do NOT want to pick from what someone else chooses for you. Almost everything said here by everyone else has been true, but you may not find it workable for you due to the size of your hand, body, where you're going to carry, the way you draw, etc.
Take some time and make sure you fit YOUR gun to you, and don't be influenced by sales, salesmen or rhetoric - stick to facts and the way it feels as your life is too important.
Malo periculosam, libertatem quam quietam servitutem." (I prefer the tumult of liberty to the quiet of servitude.). Thomas Jefferson
"All that is necessary for the triumph of evil is that good men do nothing."
-Edmund Burke, Loosely translated from Thoughts on the Cause of Present Discontents. (1770)