yeah, this is where weight reduction becomes more of a pocket science on the plus or minus side.
Where as taking front seats off and replacing with either factory race or fiberglass seats will cost anywhere between $100-500 Dollars to shave off 80-100 lbs is logical as compared to replacing a windshield that could cost $200-300 Dollars just to remove 10-20 lbs.

Pick the battles carefully. It can get costly but still probably not as much for a mega motor to pull all the weight while needing constant maintenance.