why not just get the creative nomad III? i got my 20 gigger for 307 shipped, the 40 gigger is out now for 470. or the archos multimedia player, 20 gigs for about 370 (also has a screen to watch movies).

i have my nomad mounted on the center console and have a line in to my jvc head unit. it has the benefit of being mobile (it's a little smaller than a discman). you can also upgrade the drive so when 60 giggers become cheaper, i'll swap it out.