just get a stickier tire in the stock size, maybe move to a 215 but no wider. straight line performance will increase, but dont expect to take turns very confidently with a 235 tire on those wheels
very nice. you should invest in a cold air intake though. i recommend zzp's. your IAT's will drop significantly, which means more power!!! theres a reason why the lsj had a cold air intake from the factory