It really comes down to personal preference, but I would definitely recommend going longer. I'm 6' 3" and was choosing between 177 and 185 for my Chronics. Went with the 185 and couldn't be happier. The longer ski feels so much more stable underfoot at higher speeds, not to mention you can go way faster with a longer ski than a shorter one. Can honestly say its made me a better skier in terms of turns and whatnot. The only issue I've had with a longer ski is that sometimes in tight trees the tails sometimes hit a tree if you turn too quick. I would go one size up from 177