It might be worth experimenting with these for the money...
Fork Preload Adjusters for $28.
I'm 200lbs, in addition I run panniers, tank bag & 4.1 gallon tank and before trying these I was eyeing the full blown Race Tech kit from Procycle to deal with bottoming out the forks.
They got a very good workout last weekend on a run in to the China Camp off of Middlemarch Rd in the Dragoon Mtns, a rocky & rutted trail. They've all but eliminated bottoming out while still maintaining compliance. When a rut did sneak up on me and I hit it hard enough to bottom the forks, they changed the event from a metallic bang to a slower, more spread out thud.