How many gallons are you looking to skim?
There are many, many better options out there than an Orca.
Aqua C EV 1000 is a decent skimmer. Probably middle to bottom of the downdraft/beckett that i have used. Better than almost any needle wheel, though, if you use the right pump with it. You will need a pressure rated Iwaki, Blueline or PanWorld pump - don't let anybody convince you to use a Dart or other pump of the like since they just won't perform. I probably have some that you can borrow if you want.