The Foundry is a big motivation for me to try this game. If it attracts same kind of talent that nwn 1 and 2 did with their module-making editors then we will be in for a treat. It would be also interensting to dabble with the Foundry myself.
Halfling rogue would be my choice. Rogue gameplay seemed very nice in the beta reviews it will be interesting to see GWF and control mage in the future.