Build an E-Commerce Site that sells cpu memory upgrades

I need to build an e-commerce site that sells memory. See [login to view URL] and [login to view URL] for an example. I need an SEO optimized website that features an extensive back end database, CRM, shopping cart, secure transactions, user account access, and a simple way for a non-technical administrator to add new products, photos, etc. This site should be very simplistic. Minimal graphics. All navigation and product lookup done from the homepage. Alot of products though. We provide memory for all computer manufacturers and all models. Need this built in about 6 weeks