J-Aqua - Actually a wet/dry is used in most large aquariums including FW. If you end up buying a tank that is drilled for wet/dry its usually worth it to use a wet dry. It depends on the situation you are in. If you are not using the tank as a display tank a couple power filters, a canister or two, or combination would work. A wet/dry is very easy to maintain once you have it set up properly. You also can hide your heaters in the wet/dry, flexibility in filtration media, has a higher bioload capacity than canister or powerfilter, you can make (usually at about the same cost as a large canister filter) or buy your own wet/dry, you also provide more oxygen to both the bacteria (who are very oxygen hungry) in your bio media and the water because it trickles down and gets exposed to the air. I have a 300gal that has a sump and would not even think of filtering it with power filters or canisters since it was made for a sump filtration and is a main display tank, and I have a 180gal that I am building a stand for and will be using a canister or two and powerfilters since this will be a non-display tank that will house a few large fish and the tank is not drilled for a wet/dry. So it depends on what you will be using your new tank for, if it is drilled, how comfortable you are with using a wet/dry, and your willingness to try it.
