Shopping cart

I want a shopping cart with the functionality which is required for a online store to sell products. This cart should include most of the functionality these days cart [login to view URL] should import products directly from csv file and also custom fields or discount rule if [login to view URL] banners,fully customizable from back end. Template should be very good and attractive to attract customers. Sample websites - [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] Cart should be ready in 7 days time and person should also upload all my products roughly around 300. I am open for suggestion but I don't want joomla/oscommerce/zencart like cart or template. I want something customizable or like the site I mentioned above but should not be that big. My budget - Max $200 Please reply with your shopping cart demo url and don't send any junk or small product selling website url. Thanks,