My my, what's this slinky little madam? Colourful touchscreen, clear GUI, handy hardware buttons? Let me introduce you fine gentlemen (and ladies, of course) to the Archos 604 - $350 worth of audio, video and image viewing loveliness. dapreview.net took it in hand and gave it a thorough fingering.
While video is handled beautifully and photos dealt with in a pleasingly straightforward manner, they found that audio was somewhat more tricky to manage. To quote: "as a video player, the 604 is superb but as an audio player you are better off looking elsewhere even in the PMP market". Necessary add-ons (like a DVR docking station and a number of AV-codec plugins) to make the unit the core of a home cinema setup would take the total investment to around $500, which is a whole lot of money. Still, they give it an overall score of 83%, so it's obviously impressing on more levels than it's failing!
Archos 604 [dapreview.net]