recommended cam for a 5.9 magnum?

So after reading this thread several times, i think i've come to the conclusion of getting the 276 cam(from that list).

Ideally i wanted to run the 286, but it seems like it might be better to air on the side of caution w/ my comp. ration.

However, what about using a thinner head gasket? Are there downsides to doing so? is it even an option on the magnums?