The seating position for a Wing is very different than a HD. The suggestion to at least sit on one is a good one, but it would be best to take one for a ride, if possible.
Mostly every tall person I know have been a bit cramped. The mods that have been spoken about and a Backrest too are fairly important. Heck even us shorter guys put on highway pegs, backrests, and such.
Best of luck with your decision.
Whoever said a woman can't make up their mind never met a Male Motorcycle Rider
GWOF IB COUPLE #2
MEMBER GWOF IB TRIO #1/Overall #4