Out of the 3 options if I HAD to choose, I'm with Tuco, level 5 for all the reasons Tuco gave.
However, I would prefer system changes / refinements over either of the three choices. I want to know the game is shaping up mechanically in a way I will enjoy, the party composition (races and classes) is the bit I am happy to fiddle with at release and don't need to play through the early levels of all of them in EA.
