It's Aeroplan Elite by the way. (they go by Prestige, Elite, and SUper Elite)

I guess you should consider what routes u fly most often. From ur previous threads, it seems to me you have no special "trend" of flying. If you can do most of your flying on OW careers, there isn't much point for u to accquire status on AC. But, if you want diversity (which is always good to have), u can try for Elite too.

I read an article sometime ago that there were less than 500 Diamond members on this planet. (Is it true?)... if so, you can continue to fly on CX, simply so that you can fulfill your ego of being one of the world's top 500 frequent flyers! But, from a rational point of view, I would say go for AC, unless u always want to be the "top" person.