Go MODx and you'll never look back.
Want to use tables for layout (which I don't recommend, but your choice)? Fine.
Want to use XHTML/CSS, standards based, highly accessible design? Fine.
Want to add a blog? Fine.
Don't want a blog or a community portal site? Fine.
Have an existing site that you want to convert over to a CMS and not lose or have to change your existing site? Totally Fine.
Want a system that can be just made up of the components you want and also the ability to grow and add to it as needed? Fine.
and all in all, probably a much easier learning curve than many others.