A 90 sq. in racquet for anyone in the 3.5-4.0 range is just crazy. Even for the pros very few play with a racquet so small with a tiny sweet spot. Look for something in the 96-100 sq. in range. At the very least the Wilson Juice Pro is at least a bit more powerful and bigger. I would recommend looking at the Pro Kennex Ki5 or KiQ5. They are flexible with similar heft. The Head Radical or Prestige also fit in this similar range. In addition, I would suggest looking at the Yonex VCore 98 or EZone Xi 98 for flexible, control-oriented racquet.
Ex-Coach: U of Delaware & Drew U. Pro Kennex Ki-5(R) & Gamma RZR 98 (L)
Dunlop Black Widow 17 (63lb) Babolat N.Vy 16 (64lb) USTA 4.5.