Cheap skimmers vs high end skimmer?

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i just want to know how much of a performance boost will i get with a high end skimmer vsing a low end.



I have a Odyssea PS160 Protein Skimmer, it does a good job pulling out dark green waste.



I'm looking to get a Reef Octopus Classic 150EXT 6”Recirculating Protein Skimmer or a Skimz Monzter SM122 External Protein Skimmer.



Will the performance be so big it will justify the $350 for the new skimmer? Or just a small performance boost that i will like be unhappy with because i was thinking if i spend $350 on a new skimmer it should pull out at least double the waste.



My reason I'm looking at a external skimmer because i don't have a sump and don't mind seen the skimmer next to the tank on a stand.



i have a 75 gallon tank with 2clown, 1 foxface, 1 blue tang, 1 sailfin tank all less than 2 inches big.





or should i build a sump and get sca-302