Take a look at Euro-Reef. Do a search on this site (or the web) and you'll find tons of info on these skimmers. They're top of the line. For around $200-300 you can get a good one for your tank.
Another good skimmer from what I've read / heard. I use Euro so I can't tell you too much about that one. I know alot of people use that skimmer. Euro & AquaC are both considered to be top line skimmers. Search the site and you'll find lots of info on these skimmers.
I have the AquaC Urchin and love it. The main thing I like about it though is that it is fairly quiet (my tank's in my bedroom). It does an excellent skimming job as well!
