I'm 5'10-11 weigh 165lbs, I checked them out at the store and liked them but I ride 50/50 park/groomers so I don't know which length to get. My old skis were 176 salomon suspects so I think I should size up.
I would always go bigger. At the worst, it challenges you to get stronger. You may not be able to do as many switch ups, or 270's on, but on stomping big jumps, and anything in powder you will love them. Consider mounting point too, 185 centered will actually feel pretty short...
185 is a lot of ski to throw around in the park, especially full camber like the ARV. im your size and this is a tough call. because i would want 185 elsewhere and 175 in the park. my recomendation is consider where you will be using this ski more... what mountains do you ride?