I want to photograph my sons BB games this season in dimly lit gyms and could use some lens advice. I own a Nikon 50 f/1.4G and D, 85 f/1.4D and 35-70 f/2.8D. Of the three which would you choose? I won't have the option to roam the court so want something to cover with one lens close to the basket. BTW, camera would be a D700 and if the high iso isn't to bad maybe my D300s as a backup. I generally photograph family and nature.