pine knob...grooms there park 1 - 1.5 times a day and proably has the best jumps anywhere, biggest hit was measured by some snowboarders at around 55ft. Pine knob also has a decent varity of rails and boxes and apperntly has a TON more including a teter totor box but none of the have the plexi glass to go on the top of them, they will hopefully be up this year. I skied Mt holly for about a year they didnt groom there park as well as pine knob and it seemed to me the jumps and rails where all smaller than pine knob, although mt holly seemed like it wasnt as crowded as pine knob, i havent skied there in about a year though. Brighton (i havent been there for about 1-2 years) and when i was there they had shitty jumps but some pretty cool rails that were real close to the ground though. I dont know much about Alpine valley but the one time i was there they had some pretty sick looking rails but i never got the chance to try them. If i were you i would defently goto pine knob. To get the best idea i would look at the peoples videos who post on here then you will get a better idea of the shit. I did this to the best of my knowledge and havent been to these places in about 1-2 seasons.