Yeah, HD has a slightly better camera, bigger screen, and a few other things better than the normal Desire. With prolonged internet/call use, you'll definately see it eat into battery life. As for music, can't really comment, other than try and get some portable speakers for it, the standard one on the NORMAL Desire is a bit pants, but all inbuilt speakers are really. I can't say what its like on the HD tho. Using internet on the phone is nice, with all the standard touchscreen phone features (zoom, automatic orientation depending which way the phone is up etc). The actual phone itself is really well built, I was surprised. Nice quality materials etc etc, they don't look like cheap plastic. Dropped mine about 3 times now, and all there is is a few marks on the casing, didn't affect the phone itself at all!