Which Cowon supports line-out w. screen on?

[staatsof]

I have looked around a bit at this and here's what I'm looking for:

WAV & WMA-lossless support.

line-out capability (not a head phone jack jury rig) that also leaves the unit fully functional. I have read that the J3 (which looked like a good candidate) turns the on-screen functions off once you enable video out. So it's not clear to me when/how/if audio line-out would operate on that or any other model.

This be utilized as an in-car solution for replacement of the CD-changer.
I have an aux-in and USB as well. So a cable that plugs into the Cowon and provides stereo line-out with a USB pigtail that could pug in for power would be ideal if the Cowon can be charged or powered in that manner.

Thanks