eCommerce Ajax Search Options

[ishan]

Hii Friends,

I want to build an ecommerce website for apparel with the following features :

1)CMS for products/categories/users
2)1 page checkout
3)Normal checkout
4)Payment integration with authorize.net
5)Newsletters
6)Advanced search

Have a restriction that i cant go for prestashop or magento or oscommerce.

I could find all these features in CS-CART except for Advanced Search.
When i say Advanced search,i want something similar to National Curtain Company; when you click on any category,you'll find that products can be shortlisted via some attributes like colours,variants etc.

Thats the same thing i want for me.Is it possible in CS-CART?
Or can you recommend any other open source cart which i can use?How to go ahead with the advanced search?

Any help would be greatly appreciated...
Thanks a ton!