With the 6" lift and 37s I like using the 10" drop for the boat, the 8" works and sits pretty good, but I have noticed with the 10" I can actually average getting more fuel in the boat at most gas stations. With 8" I could never get enough in to where when on the water the gauge would read full, would be between full and 3/4 , and would always end up at 1/2 tank just before 3 hours, with the 10" it sits on full for little over an hour, almost get an extra 1.5 hours on the water, makes it nice, since 80% time we go out, we go until were almost empty.