Take a look at the Ocean Clear 318. I've got 2 of them on my 225, and love them. They're really easy to hard plumb and will go forever between cleanings. These filters have a screw on lid that is much easier to deal with than the Nuclear's Clamp/screw top.
225 Gal, Glass "Reef Ready" w/ twin Iwaki Pumps & 2 Ocean Clear inline filters. Custom 420 watt LED Lighting system utilizing 90 Cree leds, 3 -50watt BridgeLux arrays, "Typhon" LED Controller, and a 20lb CO2 system w/ Milwaukee Ph Controller.