I'm rolling Republic and have no interest in PvP, which I know puts me in a minority here. Taking that into account and based on a few combinations I tested in the Beta my first team will be a Vanguard Tank with a Sage DPS. I tried that team to the high 20's and it worked very well. I'll also level a Commando DPS / Sage Healer duo.

I'll level the two duos separately, but they're on a total of 4 accounts. At 50 I'll bring the two duos together to do Heroic FP's. That's my plan.