Actually, I use my ps2 for dvd and music more then I use it to play games. Ps2 has a high definiation output cable, so Xbox isn't the only ones capable. Ps2 also has a optical digital output for sound. Not sure if the other 2 have that or not... Anyways, it was just darn cool playing MGS2 in Dolby Digital
As for the Xbox... you can supposedly rip audio cd's onto it's hard drive. That would be kinda cool to have...