I currently use Wilson Stamina Synthetic Gut 16g at 58. I kinda feel like this string is too soft for me. I'd like to move to a stiffer poly, or maybe go up in tension. I recently had my racquet restrung, but my good friend(the stringer) happend to not have anymore Gamma Zo string anymore. He, instead used Prince Synthetic Gut 16g at 59 to see if that would help. It felt pretty good at first, but I'd like to go even stiffer. Do you think I should go up in tension, or search for a stiffer string? I have no problems creating pace.