Web Design Expert in Online Marketing

I’m looking for a complete web design from a company who can provide internet marketing services. I know search engine marketing is the way to go, but I don’t have anyone on staff who can do SEO work. I don’t want to go the backdoor route and pay for targeted traffic after the fact. I want this capability built into my brand new website design so we can promote our brand. My ideal designer can also advise me about Pay Per Click and other ways to do search engine marketing. Is this the best way to find potential customers and let them know about our products and services? I can’t say we have anyone on staff who specialises in this area. I need good advice from the start on keyword research and analysis. From what I’ve read, it’s really important that we get landing page optimized and high rates of click through.