Needing an e-commerce plugin

Hi all,

I am building a website for a customer who is going to be selling pet supplies for cats, dogs, horses, etc. Does anyone have a a recommendation for a plugin that can be used for e-commerce within Word Press? Ideally customers would be able to browse products on various pages, add items to a shopping cart, and finally check out. I would like for shoppers to have the option of signing up and being able to save their shopping information.

Any recommendation is appreciated.