What would be the best team for us in PVP 2vs2 cataclysm?

Well, i ran a team of Holy pally / Frost Dk, and we never lost a fight. In my opinion, for 4.2, go for Warr / Shammy. A geared Resto sham won't go down easy, and can even hold their own for a while. The Warr is good for keeping them out of the fight and doing intense damage. The Rogue is too risky to run, if you dont get a stealth hit on them, your chances are low on living, and a priest needs to be very very skilled (due to squishyness). Good luck.