I need to build an e-commerce site with a nice interface, with good management of products to sell. All products are those that concern the fashion (eg. t-shirts, dresses, pants, shoes, bags and so on.). the platform can be prestashop 1.5.4.x or Magento 1.7.x. I must have the ability to let the customer to choose, for each product, size and color and where necessary also printed design. The size must be very well controlled because it is an important element.