Tires: What size can I get?

I have a 2010 Tacoma TRD Offroad PreRunner. I recently had the rear leaf spring TSB done and have a set of Bilstein 5100's waiting for me at home. I will be putting these on this weekend.

With stock alloy wheels, what size tires can I get? I want to go bigger than the ones I have (stock tires with only 20k miles on them). What tires and sizes do you recommend? I drive mainly highway miles and love the AT's that are currently on there. They seem to be a great mixture for when I actually do a little offroading.

 

http://www.tacomaworld.com/forum/wheels-tires/67550-largest-tire-sizes-stock-suspension.html

 

You can't go any bigger than the link posted above unless you get wheel spacers in addition to your lift.