What size tires?

[72step]

I am a phone call away from ordering me some 15" Torque Thrust II's. I just want to make sure I get the right size tires. Right now I have 15x10 rallys with 275/60/15's out back and it fills out the fenders well, but they are a tad too tall for my tastes. On front I have 15x8's-235/60/15's, and they are alright, it could use a size bigger perhaps, but I'd appreciate any pics/advice Also I have 2.5" spindles out front with a 4" drop out back. Thanks in advance!!!