Hi

I'm in search for finding the best solution for adding "faceted-style" filters for existing website with Drupal Commerce.

Current website has product categories on the left and products for that specific category on the right. (simple View page which lists products)
That image describes it well (just don't look that color filter): http://goo.gl/X5qwsP

Products in different categories have different fields - some products have the size field, some don't have it.

Desired result:
When I choose category from left, products show up at right and then on top there is possibility to filter products in that category by different filters.
That image describes it well: http://goo.gl/dcVL1u

Now I'm not sure if that should be done using Faceted search and it's possibilities or rather exposed filters?
Although site will have Search API in the background for "Search" page.

Thank you very much for any hints.