Finding the perfect pick is our eternal quest! The Jim Dunlop Tortex picks are my favourites so far. The Jazz III's feel just a little bit more snug and controlled in my fingers than the Standards. I'll commonly use the Orange 0.6 for flat picking and the Yellow Tortex Standard pick for strumming.
These pick are great for just about anything. They are perfect for speed and accuracy but equally ready for just strumming away or heavy blues bite, once one goes jazz three, once never goes back.