Company website update

I would like to refresh my company's website so it looks contemporary, is easily editable by us inhouse and is structured so it works well on tablet devices - but not using flash. A website I very like like the format of is [login to view URL], so something along these lines would be good. We are a book publishing and publishing services provider, so we need to be able to show off a portfolio of work as well as discuss our writing and editorial services in clear simple sections of the site. Our existing site is [login to view URL] but the new one as a scrolling format will have fewer pages but most of the same content, although I will be updating that too. Wordpress may be a good solution, but as long as we have simple editing of the content (images and words, not structure) I will be happy. I need to keep our company orange colour and the new design could make use of elements of our logo. The site must show us as a publisher, but contemporary, and that we work in the digital age too as we are increasingly offering digital publishing solutions to clients. I hope that provides enough detail.