Ecomerce solution needed, with unique design, and optimised for speed.

I am looking to creat a health/supplement cart for one of my domains, need someone to design, and build it, it must have admin features, uk postal, good seo, meta tags, analytical statistics, inventory management, newsletter subscription, and easy creation of site content, and newsletters, please bid, post your examples of work completed, both front end and administaration. Regards