I also found an australian company who sells penguin filters

first one i've ever seen, a little more pricey (only $30 extra than the aqua clear 500) but from what the americans have said they are far better quality than the aqua clears.
http://www.aquaticlifeaquariums.com.au/But your thinking of getting 2 of the supreme aqua ones? I have no idea about the quality of them, but they do seem extremely cheap. I'd look up on the quality first before diving in (i'm totally against impulse buying

except when it comes to the actual fish.. not many people have the strength to resist that!!) Look at buying extra/replacement filter media, can you buy it redily? Also parts, the impeller, intake tubes and the like, but then again they are so cheap you could just buy a whole new one with the filter media dies

hehe