Watched the vid below along with many others on the sunsun/aquatop. Just got it and I will say the quality is pretty good. It was very easy to set up and prime. I can barely hear it too. I HIGHLY recommend it. I ordered my Sunsun 304 from amazon for $60+ shipping with media if I remember...
Just saw this at Marine Depot.com, how long before it's available for freshwater?
http://www.marinedepot.com/ps_aquariumPage.aspx?pageAlias=deknarp_biogenics