Another option is to convert to a 1×8. You loose the front shifter, derailleur and some cable. Should be fine for commuting or riding around town. You might want to add one of those plastic chain keepers that go around the seat tube. They are < $10.
If you are riding Big Creek upgrading your wheels will net you more speed than upgrading your fork
I second the clipless pedal idea tho’ as number one and you can do this for 200 while a (only) 200 for set of wheels would be a waste of money.