If you want to belt the ball and only lose a little weight the have a crack at the Roddick. It's solid, powerful and has a massive sweet spot compared to the six one. You will lose a little control but will find it a lot easier to middle the ball.
“There is no best. There is just the discussion of who is best. Federer, he will always be in the first part of such a discussion.” Rino Tommasi