the one on ebay is the same one that I got and the skimmer is crap, you dont need the bio-balls, the pumps havent given me a problem yet but they definitly arent the best.
you'll need to buy a better skimmer anyway so you might as well do that instead and spend the rest of the money on a plain tank and put your own baffles in. It will be cheaper I promise.
I ended up adding 2 more 10gal tanks to that one cause I wanted a bigger refuge and my new skimmer wouldn't fit.
Kevin in Billings, MT
no tanks at the moment but going to have a massive build in the future