Best filtration for a 55g freshwater tank?

I've had 2 emporer 400s hanging on the back of my 55 freshie for a long time. And actually another emporer 400 on my 29 gallon.

They say that 1 of those is enough for a 55, but 2 really work well.

Online, the filter inserts are 4 for $9, filled with carbon, and they have the biowheels and what not.

Just good filters, which i've yet to have problems with. And I don't even think they're very expensive, quite honestly.

:-)
 
PS - I think you posted this in the salt water section.

Also, as a PSS- you might not need 2 Emporers for your tank, depending on the inhabitants. I used my tank for oscars and other big messy eaters, so the extra filtration was nice.
 
Indeed, posted in the sw section.
Regardless, how many and what type of fish do you plan on putting in the tank?
 
AquariaCentral.com