DVI and HDMI are essentially the same connection, only difference is the HDMI cord carries audio along with video. So in your case you'll need to be able to hook up you audio to either your tv or stereo with an additional audio cord.
Video Specs from Apple:
DVI video output to support digital resolutions up to 1920 by 1200 pixels; supports 20-inch Apple Cinema Display and 23-inch Apple Cinema HD Display; supports coherent digital displays up to 154MHz; supports noncoherent digital displays up to 135MHz
VGA video output (using included adapter) to support analog resolutions up to 1920 by 1080 pixels
S-video and composite video output to connect directly to a TV or projector (using Apple DVI to Video Adapter, sold separately)