SEO-Friendly CMS Program, Anyone?

Hello Everyone,

I am looking for an SEO-friendly CMS program. Until now I have built my sites the old traditional way. (Plain HTML editor).
The new site I am about to launch will be massive and cannot be managed without a decent CMS program.

I am not looking for a free CMS, but rather a company that has an SEO-friendly CMS and that provides support if needed.

Your feedback will be highly appreciated.

Actually more and more CMS programs are SEO friendly right out of the box these days. It used to be an add-on feature. I'd recommend pmachine.com, which the CSS Library portion of DD uses. You can see how the URLs look.