Best skimmer for the buck 120 gallon system

Check out the SWC skimmer brand. Just google it.

Yes I ahave a SWC very good skimmers
For a 120 the MINI -S or the SWC 200 would be perfect!

Reef Dynamics makes awesome skimmers.

http://www.reefdynamics.com/INS135-Protein-Skimmer-p/ins135.htm

Other options that are around the same price point include Reef Octopus Extreme 200, Bubble Magus BM150 PRO (some people swear by Bubble Magus), and the Vertex IN 180.

http://www.youtube.com/watch?v=tXuEebGU9zA

Part 1 of an 8 part series on skimmers. The person being interviewed is the owner of Reef Dynamics so some of what he is saying is a bit biased towards their design. That having been said there is still a lot of good information in the videos.

Best skimmers bang for buck are AquaC. They are on the pricey end...but not the most expensive, and I would say they are a top three brand.

Heres the unit I would use on your system:

http://proteinskimmer.com/Product%20Pages/Remora%20Pro.htm

Yes...its for up to 120g, but your not generating any waste in your sump, so I think that should be fine. Give it a go, I dont think you will be disappointed.

That being said, remoras have TWO distinct break in periods. The initial one, (which for me was only a couple hours before it started to skim) and the secondary one. The secondary one results in less skimmate, but it will be VERY, VERY dark. Tank is doing well, and I am very happy with mine. Good Luck!