I will be setting up a 75G brackish tank and would like to know some opinions on what would be the best power filter. A AquaClear 500 or Emperor 400 w/bio-wheel? I imagine that most people are going to say that the Emperor will be better, but I'm running a AquaClear 300 in a 29G and have not had any problems. I have both power filters, just would like to know which would be recommended. Thanks.