For my Suzukalypse project, it looks like I am going to be going with Bushwacker 6" fender flares.  I want to make sure that I get the right size and offset wheel and tire combo.  I have done a lot of searching but I see a lot of conflicting information so I am still not 100% sure so I want to verify before I go ahead and start ordering parts.  I want the wheels and tires to fill the wells, but not stick out or be too inset.

I am thinking a 15" x 10" wheel, with a 30" or 31" tire (to go along with my 3" lift).  Is my thinking correct?  If so...what should the offset (or offset and spacer combo) be?

Thanks for any help!