I have a 180 gallon tank with two overflows, I do not want a sump, I want to use canister filters. Two FX6s would be too expensive, and is overkill IMO. I need two canisters, what model do you think would be the best for a pair of canisters? I'm just planning on having one Jardini arowana in the tank. Ideally I'd like to go with Eheim canisters, since I've found them to be the most reliable.