in essence, everyone is right. If you re-read the OP's original question about using the onboard DVI connector - no, it will not carry audio. If you purchase a video card, specifically ATI or nVidia as mentioned, then yes, the DVI-D connector can carry audio.
My original answer was referring to the motherboard DVI-D connector. If the OP gets a Video card, it's a MOOT point as more than likrly, the card will have a HDMI output which solves everything.
Denon AVR-3311CI, Denon DVP-602CI, B&K Reference 200.7 S2, Belkin PF60
Sony BDP-S5000ES, Silverstone HTPC (6 Tuner DVR & 10 TB Media)
PSB Stratus Minis, PSB Stratus C6, PSB Alpha S surround, James Subwoofer EMB-1200
Sharp LC-70LE755U, Harmony 880 Remote