I just want to offer a little input regarding balancing disparate power levels in
Champions or other point-buy supers games: Hero Games's electronic magazine,
Digital Hero, provided an in-depth article in issue #3 by veteran HERO player Theron Bretz with some of the best advice I've ever seen on how to approach this issue,
Pointless Champions. (No, not the way some of you are thinking.)

There's a very sizeable free sample from that article posted on the Hero Games website, here:
http://www.herogames.com/digitalHero/Samples/dh03pointlesschampions.htm