If you can, get both.
Tline terrain is miserable but has sick parks, Ski Bowl has awesome terrain but doesnt get much snow due to its elevation, and Meadows is an absolute clusterfuck due to racers and day-passers.
Unless you really prefer park over freeriding (or vice versa), you will be really unsatisfied with just one IMO.  Not to say that you can't have a good time in meadow's parks or tline on a pow day (it's still powder).