what size tires

[chevy2007]

2007 regular cab new body style,I am leveling the front out with a 2" lift and I am not sure what wheel size to buy. What is the largest size I can put without rubbing on the front but still filling up the large wheel well in the back? looking for a little wider than stock maybee a 265-275 all terain. Daily driver, 2 wheel drive, tires for looks only.
HHR Accessories (http://www.gmpartsclub.com/chevy-hhr-parts.html)