Help me choose birthday skimmer!

[FishyFishy!]

My brew's birthday is almost here, and I wanted to get him a new skimmer for his new tank (that i'm building for him). The tank is a Konolua Volcano tank replica, with a 50 Gallon (44" X 22" X 12") display, 60 Gallon Sump, and 30 Gallon skimmer/water change tank. Total system gallons will be roughly 120 gallons with stuff not being filled to the top.

So a skimmer good for 120 gallons, and $300 or less -

I've been looking at -

Bubble Magus Curve 5 - $184.99 (up to 140 Gallons)
Bubble Magus NAC 6 - $199.99 (100-160 Gallons)
Reef Octopus NWB-150 - $229.95 (up to 150 Gallons)
Bubble Magus NAC 7 - $249.99 (130-185 Gallons)

And these are a little expensive, but if people think that it's really worth going with one of these it may sway my mind.

Super Reef Octopus 1000 Internal - $299.95 (up to 125 Gallons)
Vertex IN180 - $298.00 (100-180 Gallons)

Let me know what you guys think would be the best skimmer for the setup. I want to buy it soon!