Hi there... I am from India and wanted advice on buying a new racket. I at present have wilson ncode 80 and yonex arc saber 10. i want a racket which is light and which could be used in both doubles and singles. I have some amount of shoulder stiffness(due to past rotator cuff injury) due to which my swing speed may be slower. i prefer long rallies with drops from the backcourt and occasional smashes. i was thinking about buying the yonex Nanoray 750 / yonex Voltric 70. What do you suggest ? any other suitable yonex racket than these two?