I have an HP Envy14, which has 'beats audio.' I cannot tell you how it sounds with beats headphones because I do not own any, but I will tell you that 'beats audio' here means IDT audio with a beats audio skin on the audio control panel. Audio quality wise it is better than most laptop audio... but that doesn't say much. On sensitive earbuds you can hear an audible hiss.
Edit: sorry I don't have much time to type out a full response yet, I will keep an eye on the thread if people are interested later though.
Edited by Snuggles - 12/13/10 at 11:48pm