Wheels and tires
 

I have a 2000 GMC 1500 4wd, and I was wondering what is the biggest tires and wheels I can put on it, it has a 3inch lift, I currently have 305 r70 on factory rims but want to get some nicer rims, any help would be appreciated, I was mainly wondering if I should buy 8, 9, or 10 inch wide rims, what do ya'll think.

Thanks in advance,
Joey