I want to pick up a new set of tires for the my 350. I want to get the ITP Holeshots in a 22x7x10 and 20x11x9, what do you think about these sizes? Also, the fronts are the XCs and the rears are the standard Holeshots so all 4 tires are 4 ply. The store wants $600 w/ tax to put them on the...