In all seriousness, I see your point, but I would point out 2 things: Those measurements are 10 years old, and it's barely rolled off at 80Hz. In fact, from ~90-105, it appears to be a higher hump than the rest of the frequencies, at least until you get up to the very, very highest treble. Further, since the crossovers are not a hard and fast cut off, but a roll off, 80 Hz would probably be a reasonable place to do it.
OTOH, to the original poster, play around with it; use what sounds best to you. 2x6 is right in at least 2/3 of his signature.
