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Furniture
No matter what components you buy you will need something to put all your gear into. A/V furniture can be one of the hardest items to shop for. Sure many department stores offer TV stands and the like, but these things will most likely never fit your equipment needs, allow for expansion, or supply enough room from behind to hook up your system.

The more time spent looking for quality A/V furniture the better. It will pay off both aesthetically and functionally.

Speaker Stands
You'll want stands that are very solid and heavy duty. Find out what to look for in a stand and what size is best for your speakers.

A/V racks
These things need to hold your components, hide your wire, allow for expansion, hold your TV, and give your components enough breathing room so they don't overheat.

Wall Units
Wall units are the alternative to buying a TV stand and a rack. These things can fit a lot in them, but also have their disadvantages. Find out what's good and what to watch out for.