Trio team suggestions?

I currently have a team of 3 shamans at 61. Enjoying it, but the issue of not having a tank has caused me some issues with trying to run instances even though I've been offering my main as healer (but not speced Resto yet... maybe I should invest in dual-spec on my main).

Anyway, the thought crossed my mind to try a tank + healer + something team. My accounts are very old, so no RAF. A fresh team will have to be leveled old-school (yes, I leveled my 3 shamans old-school too).

So my options are as follows:

1. Fresh trio
2. Use existing 80 DK [s]or 70 pally[/s] on main account as tank, old-school roll up two new toons
3. Use existing 80 DK [s]or 70 pally[/s] on main account as tank, transfer 70 priest/pally/shaman from main account to other accounts
4. Use existing 80 DK [s]or 70 pally[/s] on main account as tank, drop the main shaman from my trio and bring up the other two

The DK felt like the best tank to me, so I doubt I will bother with the Pally. DK is also Mining-450/JC-438 and already over 540 Def.

Suggestions appreciated.

Sometimes I feel like I have WoW toon ADD...

DK tank, ele sham, resto sham, than all you gotta do is fill 2 dps spots which should be easy.

That's a good combo. Also DK, BM hunter and resto shaman. You kinda have a 5 man team there with the 2 pets. and the occasional fire/earth elemental.