This in my opinion should be done with Custom Post Types – and then assign a taxonomy with that (which could be product type?) – then you can style the taxonomy archive page however you like. So you’d have all of your products displayed on your archive-custom_post_type_name_here.php and then your Product Type (taxonomy) archive as taxonomy-taxonomy_name_aka_producttype.php
You can use a generator to create the code for Custom Post types and taxonomys here : http://themergency.com/generators/
So overall you’d have a Products as a Custom Post Type and then Product Types as a taxonomy (this works like categories).
Then you can add your custom fields to the Custom Post Type and display them as single-custom_post_type_name_here.php
Hope that makes some sense!
