Replying to New park ski for 2012/2013 Season

Hey all,

I decided to go with the ON3P FR's however I still have two questions regarding it.  I am 5'11 and 170 Ibs, so should I get a size of 176 or 181 cm?  I like doing everything in the park, small to big booters and grinding all sorts of rails.  Also, with bindings, should I go with the Salomon STH 14 Driver or the Rossi FKS 14?  Ive had the FKS 14 in the past and it was just ok ( I liked it however it didnt feel like other bindings I have tried in the past.  I just feel like they don't ever release and I have fallen in positions that I feel they should come off).  Would the STH's be better in general?  Staying on and releasing when you fall, feel stable, etc.  Thanks!