I'm a bit interested in the BLX Blade Team or the Donnay Pro One Oversize Extended. Both of these racquets are much more powerful than my current stick, the Rebel 95 (2009). However, the BLX has a flex in the mid to low 50s. How is it that a soft racquet can be that powerful? I understand swingweight and headsize make a difference, but the swingweight of the blx is pretty low too. Is it just the bigger head? Is it beam width?