STEP 1- Choose the number of DVDs it can hold.  
Many are satisfied with a single-disc player,but a multi-disc DVD changer gives you the same great picture and sounds and holds more DVDs. Choose from carousel models that hold a handful of discs, or bulkier mega changers with room for up to 400 discs!

STEP 2-Choose between progressive scan or interlaced.
Progressive scan video does look cleaner,smoother, and more film-like, especially on 32" or larger TVs. But progressive scan signals can only be seen on HD-ready displays through the component video outputs. Most of the progressive scan players let you select 480i interlaced-scan output (for use with TV) or 480p progressive scan output.

STEP 3-Pick which formats you want it to play.
In addition to playing regular CDs, many DVD players can also play music discs you record yourself on a computer. A growing number can also play MP3 and WMA files burned to a CD-R or CD-RW using your computer. Some new models are also able to play either DVD-Audio discs or Super Audio CDs (SACDs) and a few "universal" models can play both.

STEP 4- Make sure your TV has the right inputs.
A big part of choosing the right DVD players is making sure it has the necessary video and audio connections to perform to its full potential with your other A/V gear.