Before you consider doing any of that you may want to put in A LOT of work optimizing your site. Right now basic usage of your site is difficult because the page takes incredibly long to load. I ran it through one page load waterfall tool and check it out:
http://www.webpagetest.org/result/10...H4X/1/details/
Time to first part of the page appearing is 28.953s, time for full load is 44.061s. That is a loooooooong time. I was stressing out when some elements of my site were bumping me from 2.5s to 3s.
Your total images is 275K, and that doesn't include 112k in CSS images. It seems due to really big banners and a ton of mini icons all of the place for toolbars and bookmarks,etc.
Your javascript is 588.6K although fortunately you are using minify so it gzips lower.
But I think the big issue is there is something on the page that makes the load difficult. Maybe it is the toolbar on the bottom of the page. I say that because the page takes 28 seconds to load even before trying to load any images.
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That being said, why do you want your page to look like theirs? It is an interesting way of doing it, but definitely doesn't seem like the only good way. It makes more sense for their site to do that since they don't sell all the other items that you sell - which is why categories work well for you.
Just remember, cool tools are only cool as long as they don't reduce usability & load time.
-lindasdd
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