language travel agency website - seo skills required

We are a team of two (designer and engeneer) that provide web development services. In the next four months we are going to rebuild the website of a medium sized language travel agency located in switzerland. The website is fairly old and has not been optimized for seach engines so far. We want to create a new attractive SEO website based on state of the art technologies. We have strong experience in website development but do not have much experience in SEO. Well known competitors have up to date websites, our mission is to overcall them with an even better website. For insatnce one challenge of the project is not to loos page rank due to URL changes. We look for someone that is willing to help us building a solid SEO concept and to answer SEO related questions. We can also think of a long term partnership since other projects are in the pipeline already. We have assembled some questions of our interest that might give you a picture of what we expect from you: What are the main aspects of SEO urls? How can I track users (e.g. click paths) in google analytics most efficiantly? What can I do to tell google to show site links? Can I influence that in any way? Does google prefer HTML5 in contrast to older standards? What are the most effective off site activities? How does google value entries in directory services? Does the file extension matter (html or php or ... nothing)? What can I do to prevent ranking drops due to URL changes? Would you recommend using a tool like SEOmoz? Are you interested? We would appreciate to hearing from you [login to view URL], [login to view URL]