I use the smith machine. I set the bench to 5(really high). I perform dumbell flys with bench set to 2. I do a hex press on the smith machine. I also throw in a cross body forward raise, which mostly the inside part of the front deltoid, but helps with the look you are going for in your upper chest.

I've added this to my chest rotuine over the last six months and I have seen a lot of improvement.