LF skimmer suggestions for 180 gl tank

[Coralgurl]

I'm not happy with my current skimmer and looking for help making a decision. I've read through other threads on skimmers but really don't know what to get. Unfortunately my notes are in my office on what i've been looking at. In less than a year, I'm on my 3rd skimmer just for my 55 gl tank, don't want to make the same mistakes. all suggestions welcome!