Joomla and Virtuemart.
With that combination, you can style online-stores with a beauty that I cannot imagne you can build it with other os solutions like oscommerce or xtcommerce.
For me, the shop is very easy to handle, with all functionalities that I need.
Thank you, developer, you did a great thing! I hope that there will be other developers who help you making (or keeping?) Virtuemart the NO 1 ecommerce solution!