Which one do you prefer?

With the absolutley amazing SF card this weekend i was left feeling that the UFC simply cant produce the entertaining fights they once did.
Every fight on the televised SF card delivered the goods.

In order of preference i go with
1) SF
2) WEC
3) UFC

Whats yours?
Please provide a reason for your choice aswell.

( remember im asking for the one you prefer the most, not the one which is the biggest promo etc blah, blah, blah )