Most of the more muscular players tend to try and muscle the ball using mostly their arms and have short strokes. This seems to mix well with powerful frames. You already have OS frames, you can try a tweener like a Pro Open, Aeropro Drive, BLX Blade, or PD Roddick to see if thats a better fit.
Some of the bigger and or taller players who have a longer swing seem to do well with heavier, control oriented frames. Take a look at the Prestige Mid or Wilson 6.1 18x20.