Look into MSX or reef octopus for good bang for your buck. There are a ton of skimmers out there, but look for a needlewheel type and dimensions that will fit under your tank or in your sump. Also, the guys at premium aquatics are great help in decision making. I will plug them any day. Call them or post in their sponsor forum for skimmer help.
There are some new ones out there, but I haven't heard enough to know. Just stay away from the ebay cheapos and the seaclone. If you find one you think might work, just post in the Reef Discussion forum and ask about experience with it. Typically you will get one that is rated for about 30% larger than your tank/sump volume.
Good luck,
Noah