e-commerce solution

Hi Everyone

I’ve been asked to redevelop a static site I designed for a client about a year ago so that it can be easily updated, or basically add a CMS system to it.

In normal circumstances that would be easy, but this one’s got a shop on it. Currently the shop is PayPal, but Although initially I expect this to stay the same I would like the option to be able to use another payment gateway such as Secure Trading etc.

My big concern though is the products. Each product comes with a number of options that occasionally have extra costs to them. You can see what I mean with this page http://www.booleather.co.uk/rainbow-rocks.php

Ideally I’d like to use WordPress as a solution, as I’m comfortable with it. Doers anyone know of an e-commerce plugin that can handle this?

If not can anyone recommend another solution

Thanks

Craig