Dont mix and match! specially not with budgets. Keep atleast the front axle the same tyres both sides, front to rear is ok but not different on all four corners. I run 195/40 on 7.5 +8.5's the front can pull a bit, although the tramlining got considerably less when i cut the bumpstops down.
Dont skimp on the only thing thats connecting you to the road.