Website Design & Shopping Cart

Hello All,

I need ecommerce site that will sell online game cards .. and games serials

Job details
* Web design similar to ( offgamers.com / igxe.com )
* Setting up the website skeleton pages(home/about us/etc) for me to edit and change
* Find a user-friendly website platform and ecommerce platform (magneto/prestashop/cubecart/etc) and set it up.
* Troubleshooting help

The website has to be very user-friendly:
* Easy to add products
* Easy to edit products
* Easy to add pages to the website
* Easy to add categories to the website/eshop
* Registration has to be activated by me
* Have some contents available to registered/enabled members only.
* Easy to 'like' and 'shared' on Facebook/Twitter/etc
* Easy to hide and show pages/categories.
* Print invoices for orders
* Stock control
* etc