Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman! Another shaman!

I have a 4 shaman 1 paladin team now, all 70. And i REGRET it i didnt took a shaman instead of a paladin.
Some dungeons are even easyer without the tank.

Believe me, pick the shaman. You can always level a deathknight in WotLK if you really, really need it.

-Negativ1337