Transformers Comics Multiple Covers...

Just wondering what everyone thinks about having the multiple covers. Do you try and get them all, just cover A, or whichever one you like the best?
Also, do they print the same number of each covers? I know there is a limited run of RI covers but I wasn't sure about the others.
Also, do they print the same number of each covers? I know there is a limited run of RI covers but I wasn't sure about the others.