Can you be a little more specific?
Music normally comes on CDs. I haven't seen many audio releases on DVD. Do you want it to play video from DVDs on your TV? If so, what types of inputs does your TV accept? HDMI? Composite video?
Or a small portable with a built-in screen?
Do you want something with speakers, or do you want to play music through your TV or something?
Are you after a portable device? A mini-portable like the old DiscMan? A countertop device?