Is this a saltwater tank? You don't need a filter that is what your live rock is for, a filter is usually a bad thing in saltwater traps all the junk and then your running all your water through this, unless you can comit to clean on a regular basis. If you want one for hang on the back to run carbon or poly wool the odd time pick up a aquaclear filter. As for skimmer if your bio load is low you don't need one. If i were you i would take the money you were going to buy the new filter with a pick up a Deltec mce 600. It has a media chamber for your carbon and is the best hang on skimmer you can buy.
Just an idea but its what i run and there awesome.
http://www.canreef.com/vbulletin/sho...ghlight=deltec
http://www.canreef.com/vbulletin/sho...ghlight=deltec
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360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras
360 Reef Tank