Re: Power levels of PCs and NPCs
As the GM points aren't really your concern except as they apply to your PC's character creation. For balance's sake, definately pay more attention to DC's vs. Defences, especially since you are just introducing the system.
Unless you have built the characters for your players, it's unlikely that their 150 pt characters will stand up to the same sort of punishment as the builds of more seasoned players. In the end, I say figure the total points if you want to show the players a write-up, and dont bother if you arent concerned with them seeing it.