my new team has 3 hunters in it and wow they are just insane if i knew that hunters were going to be this godly i probably would of just rolled 5 to start with, if you spec your hunter for tanking pets, real tanking gorillas with all the decent talents, they will out aggro my prot spec'd paladin (so i changed the paladin to ret now)

They hold aggro very well piss easy to heal, (they take somthing stupid like 50% more healing with talents) have a cosntant hot on them healing with spirt bond, you can spam mend pet no problems, this keeps the hp up very nicely, spam it just make a macro that stops you from putting it on more than once every 15 seconds. Judgement of light from the paladin will heal them for an insane amount, if you need outside healing from an actual healer it will be if just one pet is getting all the aggro which does happen, or your on a boss trash your not going to have a problem with.

Atm hunter pets are godly, (not sure how tuned this will be for 80, but from what ive read that they should be able to offtank bosses if spec'd for it and i really do see this a possibility) i dont think you can go wrong.

you gimp you dps by haveing 3 tanking pets, but they do a great job tanking and less healing is needed my shaman the healer heals once in a blue moon if all the group is takeing damage or the paladin agro'd.