ccCapt
Reef Hacker
The Octo DNW 150 is external and is right at $200.
That's a good skimmer. The VP of my reef club swears by those downdraft skimmers. However, they tend to be somewhat overrated for what they can handle. That particular skimmer is probably good up to a 120.Found this skimmer that would work in sump. What do you know about it. It is a little over budget but I could get it in a couple weeks.
http://www.aquacave.com/detail.aspx?ID=509