Well, I don't know a damn thing about this subject compared to the real experts around here, but how about Babolat VS Team 17g at 50 lbs? That's the setup I'm using in my Pro Kennex 5g at the moment for arm friendliness, and the ball flies!
Try it, and soon you'll be back here posting "can anyone recommend a string and tension that will tame the power of my M Speed?"