If you jump a ton get the FSE's, if you ride the whole park more of a 50/50 jumps and rails, get the ATSE's.
I prefer ground tricks better but still like to go for the ramps. For the park I like box_slide, never tried anything like a rail. and for both of the two (2011 model), what are the reasonable price for now (they should be cheaper since the 2012 models are coming out). And are there any technical enhancements in the 2012's models?