The eheim 2217 is probably my favourite cannister filter. It's design is simplicity itslef and the water flow through it is also simple. The filter is very efficient. These are bullet proof filters and should last a lifetime - unless you drop them full of water
There is a bigger brother to the 2217, actually there are three bigger brothers, but the next size up is the 2250, this would do a tank of 250 gallons with ease, here is a link I googled http://www.marinedepot.com/ps_ViewIt...ct~EH2250.html