Consider the aero difference of the forks to be essentially zero. The bike is one of the worst places to look for aero gains. Your body position is like 80% or more. Wheels, helmet, skin suit are most of the rest. Frame/fork is peanuts. It matters only when everything else is optimized.
So first focus on rolling resistance.
Next, get your body in a tuck on the fast decents.
Aero bars and A dropper post may be your best bets, since I assume in Oregon you will have some lengthy descents.