CMS and tableless design

I’ve read a few threads about which CMS to use and I tried out Mambo.

However, I find it a bit overwhelming and containing too much options I probably won’t need.
What I also found is that menus are built inside tables which I really don’t like.

Therefore my question: does anybody know of a good, easy to use, easily adaptable (changing design/layout through CSS) CMS that doesn’t rely on tables?

Or should I try to build my own (which would take forever I’m afraid)

Cheers.