Copy needed for retail website

I am looking for a writer of original articles. I need 6 articles/white papers of 500-750 words each to be written related to the products that we sell on our website www.fitnessrubber.com. We are a manufacturer and distributor of rubber products for the fitness industry. We want articles that show why rubber weights are better than steel weights, why rubber flooring is a good thing vs hard floors, ease of install, ROI, the power of rubber, injuroes etc. We will shortly position the company to sell our products wholesale, so articles about the way web saves money for institutional buyers when they register as "resellers" to their institutions and buy direct. etc These articles should project our company as being a leader and innovator bringing true value. I need them to be keyword rich, 100% original work and also they should be very much relevant to the topic. We will conduct a test to confirm the originality of these. All rights for the articles written will pass to us upon payment. The quality of the content is most important. Only very experienced people will be considered.