So let me get this straight. You come on to a thread about saving money on an fx6 and say "ugh they sound like chainsaws" then say you have never used them before? Then you compare how great and superior you think eheims are, wow, just wow.I use the fluval 206, not the fx5 or fx6. Never used those before, I prefer eheim. Also eheims have superior media capacity. Load that up with eheim substrat pro and you got yourself a biological powerhouse. Although the fluvals are great for catching debris, I use all mechanical media in the fluval and all bio in the eheims.