Not to bash on anyones choices but beware of spacers as a means of lift if you plan on off roading. I haven't fallen victim to them but many others have. Check out some of the stories on tundratalk and make the choice for yourself. My suggestion is save a little while longer and actually get a coiler over lift. It will be much more forgiving on the wallet in the long run.
As for the tire size, you will be ready to roll with he above modifications.