Wow, 85-90 is pretty small. I can't believe so many people use that.
I used to play with an oversize (110) head, but now I have settled on the 100 sq in (Babolat PD Team 3/8 Grip). The oversized was a bit too powerful. 100 seems like a good balance between power and control for me.
We all have different styles and different tennis needs I guess....
I am also curious to try the Prince O3 White. I'm going to demo it at my club...