First you wont fit 37s por 38s, not even close. I would do a 36 MAX on a 2wd with 10". Also if your doing all highway you dont want swampers for sure. You also didnt specify what kind of swamper. The STS radials might work for you, but I wouldnt touch anything else unless you plan on really using it offroad alot. Also look into the procomp x-terrains, agressive pattern, wear and handle excelent on the road.