I just bought a new stringer and I got a $500 gift card for Tennis Warehouse from a friend. I basically want to stock up on strings for my Prince Diablo Tour Midsize. I want something that will give me ultimate control with a lot of feel. I hit the ball really hard and most of the time I love to just hit all out. And yes, there is a 90% success rate. I was thinking of getting Natural Gut but I think it might be too fragile for a hard hitter.