Hi all, I'm currently looking for ecommerce site search products (for research not my own site). If anyone has any experience with a good one and would recommend it, please let me know.

I'm looking for options that perform better than your basic database match search engines (e.g. some extra features like 'Add to cart' from the search results, options to search by brand, by price, or perhaps manufacturer's part number, perhaps relevant searches that move the most popular products to the top of the search results, that sort of thing).

Thanks for any help!
Vangie