Creative Website Copywriting

We are a software startup looking for some help for creative/professional copywriting services for our company. In nature our product is a daily deal website, similar to living social or groupon, but we need to create some key business differences to share with our investors and partners. The copywriting is going to be a big aspect of that as our website is targeted to these audiences, not the direct public at this time. So the writing must evoke excitement, by exude professionalism as well. At this time it will be used for internal purposes, so it is not essential to be SEO friendly and whatnot...it just needs to ready very well for an investor type of person. The person hired must be able to work immediately as at this time we have an outline and team interview ready to be analyzed and content created based on that.