Template with Back end

[Enigmabomb]

I'm looking for a template and webpage design with a gui back end. Here's what they need to be able to do:

Edit the Text
Add a page

It needs to have a CSS menu that's dynamic.

I'm looking for something like Welcome to Quantum Helicopters

Quote me a price, but don't bother wasting your time if you have nothing to show me you've done before.

Josh