I would personally shoot for a much higher CL:SO4 ratio. I have gone at high as .15 (CL 59-SO4 387, IIRC) and the IPA was amazingly hop forward and very crisp hop bitterness. I have done a few in your range and it is pretty balanced. In fact, I stopped using my .60 ratio for my Ambers a while ago (too balanced and round) and now go with something in the range of .25. Not as agressive as my IPA ratio but leaving toward the hop highlight arena. I think you would be good to do something like Cl-50, SO4 150. Get your Ca up a little as well. Somwhere in the 100 range.
Kegged: Millenium Galaxy IPA, German Pilsner. Apricot Blonde Ale, ACE Witbier, ACE American Wheat.
Bottled: Smoked Red Rye, Old Tanglefoot Barleywine, Tripel, Dubbel, American Farmhouse Ale