Best ecommerce shopping cart script?

[Ash]

Hi,
I already have a billing system for my web hosting website, but now i would like a similar system for the services my website provides (preferably one that is free).

I would like a simple shopping cart system which accepts Paypal and which is easy to edit and adapt to my websites design. It must be very safe, easy to install and simple to use.

Here are the services i am selling to give you an idea how i need the script to work:

http://www.skyhighhosts.com/services.php
http://www.skyhighhosts.com/webdesign.php
http://www.skyhighhosts.com/webseo.php

In my Cpanel > Fantastico i was thinking of using

Zen Cart or OS Commerce

Has anyone tried these and know if they will work and if they will be any good for my type of site?

 

[DanR]

Go oscommerce any day! I use it on a couple of sites.