So I can pick a job now...

Forgive me, I don't have tons of time to play... and I feel this is an important choice. I play a Jedi Knight, and I was thinking Bio since I have no in combat heal. Can you pick 3 jobs right off the bat? I want to have a good bankroll and I know slicing is nerfed. What to you guys think? In your experience, are there any clear loser jobs? Clear frontrunners?