I've found the Z-Tour really nice...nice looking....I like it all...but it seems too stiff (72)...is it a pro o cons compared to, for instance, the pure storm? http://www.tennis-warehouse.com/descpageRCBAB-ZTOUR.html http://www.tennis-warehouse.com/descpageRCBAB-PSTRM.html is weight ok or too light? They all look like the same don't they? Similar to Pure Control Zylon or Pure Drive with new look? My impression?!?