Installing a media filter at the fan intake is a good way to lessen the problem. A media filter works like an elaborate forced air furnace filter. These work well because the filters can be changed when they get dirty. For key items, buy the highest quality you can afford. You can always add on snazzier items later.
Warranties are another thing to consider when buying equipment.
Some companies offer even longer warranties for the same price, or trade in offers on newer equipment. It is a good idea to plan some extra room for future additions. If you are buying or building cabinetry, include an extra shelf or two because it's easier and usually cheaper to do it when it's first being installed. Finding a balance in sound is the first step. Make sure to watch and listen from every part of the viewing area to make sure the sound is as good as it can possibly be for everyone participating.