Should I stick with this theme or do you know a better alternative?

I would really appreciate some input on this, I'm working on a new project of mine but you know how it is. You get so involved sometimes you miss the obvious stuff.

I'm currently using the Newscast theme but I'm just beginning to wonder if I made the right choice, there's only the 2 sidebars that are widgetised so advertising space is pretty limited.

http://cdiving.com/

Can anyone suggest a better theme that will allow me more layout options or is maybe better looking or is maybe just better in general? Or do you think this one is working fine?

All input is greatly appreciated, thank you.