If played right, they're all on par in terms of taking damage and producing threat so the big pros and cons will be in play style. If your characters are all as geared as you're saying, then you know the play styles. Is your question more which tank do people like to group with?
I like good tanks. I haven't really found one that I prefer to group with consistently. Although, I will say pallies in 5 mans that don't know how to manage their mana and drink every pull make me a sad panda.
As far as tanking goes of my war, druid, and DK. I like the DW on the DK. It's just a lot of fun for me to play.
Proud king of being one-shotted by a wet paper bag.