go for osCMax

its basically osCommerce just alot easier to edit. You can made the site look sompletely differnt by editing 2 files rather than all of them, this is because it uses a templating system, ive just used it for a site im setting up for someone. (www.tyrefinders.co.uk) all we did was change 2 files and added the new logos and image files and the whole site is changed.

www.oscmax.com is where you get the software and more information on it.

if you need any help with osCMax let me know.