I went through a bunch of cheaper skimmers for the same reason you are thinking - they all do the same thing. I decided on my latest go-around to get a good skimmer used, and holy crow I will never go back to a cheap skimmer.
I used to have a SeaClone 150, then went to a SRO-1000int for my 40B system (65ish gallons total). Night and day difference in performance, quieter too. The bubbles were a lot finer, the time to start sucking crud from the water was drastically lessened, and it's still running like a champ 3 years later. BTW "used" meant it was already nearly 3 years old and is still running the original pump. I upgraded my 40 to a 75, got a SRO3000int for that system and brought the 1000 to work. I was running a brand new BM Curve 5, which was okay, but the 1000int ripped the water apart and really cleaned things up fast. I thought the 5 was doing a decent job.
Note to self: NEVER BUY CHEAP SKIMMERS AGAIN. Suck it up and get a good used one if you have to. But my next skimmer will be a new high-class model. I learned my lesson.
Once upon a time, someone once told me "Experience is the one thing you can never get before you need it."