In terms of music playback 5800 have no competition among touchscreen.
I honestly dont understand the concept of jet . Great hardware that could easily power winmo or android is wasted with samsungs subpar os.
If you need
Touchscreen + multimedia = 5800
touchscreen + flaunt value = htc.
Btw , even though let have better screen , i'll take 5800 for video because being a smartphone it'll offer more flexibility in terms of video playback.