I like the idea of keeping it on the light side, I know the rears usually hold up to 40's well, and the 4cyl don't have enough power to necessitate anything more... but I would rather just spend the money once and go 60... Besides, once I get me a garage I can just build it over a few months and spread out the cost.
D60 up front with Toy IFS rear??? different lug pattern, different widths and 40's on a Toy = breakage for sure...