I use Prince Diablo mid with a very "hard" string set up - Kevlar and syn gut at around 64 lbs. I generally like this set up, but more and more, I feel my racquet is underpowered, and I tend to hit short when having play defensively. So, I've been searching for an easier swinging, more powerful frame. But, It dawned on me that I could also try different string set ups to get more power and make it so I don't have to swing so hard on every ball. Any suggestions?