I will add to the wet/dry side. If you can do it, there is no better setup than a good overflow / sump style filter. The overflows drain onto a sponge or filter sock of some kind for mechanical filtration, the turbulance created is super oxygenating, and you can get massive amounts of bio surface area depending on what kind of bio media you decide to go with. Alot of it really depends on what stock you are going to have in the tank as well. If you are going to have larger predatory fish, I wouldnt go with anything less than a wet / dry sump. If youre gonna have smaller community type fish, a large canister like the fx5 would be plenty, but the sump would be the better choice.