Between now and WoTLK release what to level

I have a Pally and 4 shaman I will get to 70 next week.
I have all 5 accounts on RAF.
I want to run one or more DKs eventually.
I have a 62 Warrior, 70 Warlock, 70 Hunter, 61 Mage, 44 Druid, and 63 Rogue I could move to any of the accounts I have.

Considering this what 5 box team do you think would be the most fun to level in the time left before the expansion is released?

Are you on a PvP server?

If so I have always wanted to run a 5 man rogue group for some PvP fun. You actually do some very interesting macros once you align them all to be in melee range.

Talk about stun lock! This could also probably work not too bad for PvE. Maybe add a shadow priest in there for dps to health conversion!