Between the three tanks, who's best at what? Who's the best magic/physical defense? Who's the best at aggro? What are their pros and cons? Who's most desired? Who has the highest dps? I'm trying to decide who to take to 70 between the three, and I can't decide fully. I have all three at 60 or just a bit higher, so I know the play styles, truth be told I like them all equally, so I can't just pick the one I like most.

I know these are noob questions, but I want to make an informed decision before spending hours grinding levels and gear. Thank you all for any help!