Agreed, a vast majority of skiers would go with the 184's and tell you, you're crazy for even considering going shorter. I have both the red in 184 and the White in 177. I barely use the red 184's any more (rock skis now) as I found them to be overly cumbersome in the trees, and when it gets tight west and east. Most people say my skis are too short. My buds say I ski MUCH better on the 177's. I'm 6', 200lbs. I LOVE these skis in a 177 but I also love to turn a LOT and I love super sharp arcs, I love trees and tight slopes on a powder day, and I love to bury myself in the pow rather than float on top. You will DEFINITELY lose speed on the 177's as compared to the 184's.
I would say if your aim is to ski Jay or Stowe tight trees and bumps only, get the 177's..........otherwise go for the 184's for all other conditions and if you want speed.
As an experiment I mounted a set of bindings 2 cm forward of boot center on the 184's just to see what happens..........we'll see........most say mount them behind boot center but boot center didn't work for me in the tight trees at Stowe.