advise for an (online) website builder

For a new project we are looking for a webtool or software to: - build websites easily in a few steps - makes use of a range of professional looking templates - can be adjusted (logo, colour, banners/background picture) according to the taste and businessprofile of our customers - important is that the used templates are varied in looks, but similar in structure (so that for every site to be build similar actions have to be taken to make adjustments) - websites are advertisementfree and can be linked to any domain Aim of the project is to help starting freelancers in our region with an easy maintainable and simple website. We planned to use the software sitebuilder for linux (from [login to view URL]) but this applicatios has some bugs with uploading logo's and banners.