Should I go see Avatar AGAIN?

I loved it the first time, buh now a bunch of my cousins n friends r going on my reccommendation....jus cant decide whether to spend the 17.50 (again)...i will be going there however..to drop them off.....maybe I should watch sherlock homes in the mean time while im there?..lol cant decide...and jus because I care about how much money I spend doesnt mean im CHEAP..lol