Exactly like dhnguyen said, that is not a fair comparison, the RS80 is much smaller, now you want to try and compare that to a G1? if you're determined to not spend the money on a ER or simply can't, that is understandable, but i really wouldn't spend my money on an ASM, they are poorly built. It's hard to get an unbiased opinion in this hobby, most people only recommend what they have and in their eyes that is "the best of the best" even if it's garbage anyway I'm not by any means Pro-EuroReef, but they are nice skimmers and over the years they have become more reasonably priced. The Octopus skimmers seem to be a big hit now. They're built better than the ASM skimmers and their prices aren't insulting, at least the NW200 seems to be a deal.