I tried powertech by accident in the beta. (seriously I passed out at the class selection window and flopped over on my mouse) And it has some decent dps possibilities as well, just focuses on flame based DoT style damage instead of the raw AOE and explosives of the alternative.
I have a level 50 in every class with a small pile of OC gear, really emphasizes team play. Preferred specs: Recon: Shatter/Marksman Medic: Pain Medic Assault: Tank/Point tank Robotics: xxx Stations (You'll understand if you play the game :p)