given the Tiger sail total (main & large jib) is 227.5 sq. ft, and the Hobie 18 total is 240 sq. ft. (main/jib seperate size unknown and ~5% difference), I'd go

TheMightyHobie18 (71.4)
SP .96
MN .995
MT .995

for 67.86

H18F, where did that come from? The US made "Formula" was nothing more than a standard TheMightyHobie18 w/white powder coat in lieu of anodize.