Filters on product grid

Hi Freelancers, we'd like to ask someone to code filters for our site [login to view URL] (an example of a grid can be found here: [login to view URL]). We like the ones that a leading CZ&SK eshop has - [login to view URL] - lower on the page you can see Brands, Parameters, Price slider and below them tabs - Top, Best sellers... We'd like to have them very similar - Brands, Sizes, Price slider and below tabs By Name, Most viewed, Most expensive, The cheapest. All filters should load dynamically as on [login to view URL] (using ajax maybe). In our database we already have custom atributes for brands, sizes. We can prepare PSD design, but it would be great if you can provide this as well (depending on price). Looking forward for your offers. Team ActiveStyle :)