What do you guys think about the" Octopus Super Reef 5000 & 3000 External Skimmer" ? I will need to upgrade my skimmer when I get my new tank and I need to watch my price but I want a really good skimmer. I was reading that external skimmers seem to be better if you have the room to set them up. My main tank will be about 150 gallons, and I'm now thinking of a 55 gallon fuge. What do you guys think about these two skimmers? Should I get the big one or stay with a smaller one? Is there another brand that I should be considering here (Keeping the price around $600-700)?