I own 191 Billy Goats (2015), and they are my favorite ski ever. They make heavy, manky snow feel like cold smoke. However, I could not own them as a daily driver. Once things get firm, they dont hold up compared to similar skis. Maybe the new sidecut makes it better for firm, but the shape of the billy goats do best for deep mank, chop, crud, and mildly wet to very heavy, deep snow. They are amazing in chopped up resort conditions. So amazing, theyre dangerous. All the gapers cant ski the chop and pow piles scattered every 2 feet on the groomers after a big dump, while the billy goats just blast around in those choppy conditions at 40mph. Its a breeze. Seriously, these things will have you running over people if your not careful.
For a freestyle big mountain ski id go with a Line Mordecai, whatever the mid 180s length is for someone 5'10". According to blister gear, its stiffer than the on3p jeffrey 114, which was stiffer than the new kartels I believe. If so, the mordecai would be a sweet ski. Right now im debating jeffrey 114, line mordecai, or save money with the k2 shreditor.
However for a real big mountain ski, get a on3p wrenegades. I am special ordering a 191 wren 113 this season for charging, to go along the billy goats, 189 shreditor 112s for messing around all mtn, and on3p vicik for bumps and groomers.