Where do you have them mounted?  Because I grew up skiing on non twin tip skis, skis mounted close to center ski very short for me.  I have ridden a pair of center mounted 180 cm twins and they didn't feel any different than my TMs, which are mounted at recommended.  If you centermount, it won't be a big deal.
P.S. How tall are you?  I'm only 5'10" and I have no problem handling 180cm midfats.