Good Recommandation to mock up design site

http://www.templatemonster.com/

Avid using HTML Tables to Control Layout
the W3C officially discourages it:

www.w3c.org/tr/wai-webcontent

Back to the beerhouse again

You start by establishing the user experience you want people to have, and then you design the plumbing behing the scenes that will provide that user experience. Some basic considerations that affect the user's experience are the menu and navigation, use of images, and the organization of elements on the page. The menu must be intuitive and should be augmented by navigation hints such as a site map or breadcrumbs that can remind users where they are, relative to the site as a whole.
Breadcrumbs in this context refer to a set of small links on the page that form atrail that enables users to back up to a previous page by clicking on the link segment for a page higher in the page hierarchy.

code reusability and enhance maintainability.