This may sound silly, but my biggest concern before I order several of the new n90s is my grip size. I've demoed the 4 1/2 which I found to be quite nice with two wilso pro overgrips on top of the leather. I'm just afraid a 5/8 would be a little too big with an overgrip as well. Any advice? I've measured myself with the wilson grip sizer in which I fall right below a 5/8's. I know the rule of thumb is to be able to stick your index finger in between your palm and ring finger when holding the racquet, but that just seems a little too big. Are more of your high level of players going a little smaller than the norm? I'm probably being way too picky, but thanks for the advice.