i had yakima racks on my old nissan & that worked really well. a buddy of mine has always used thule. i tihnk which ever is easier/cheaper for you should work fine. both are really solid systems.
straps thru the doors are ok if you're not going long distances, but if you're going more than say, 5 miles, i'd want racks.
i do, however, second the comment about bungees. whatever you do, get a legit set of straps to tie your board down. i'd say it's almost (or more) important as the type of rack system you choose.