I need to decide between 245/50/16 and 225/60/16 for my xtreme on all 4 corners. I want the best traction on take off and corners. I'm planing on Futura Ultra Z's from Pep Boys. They are z rated 300 tread wear AA A all-season. The 245's are $110 each and the 225's are $100 each. What would you suggest?