big difference between that m3po unit and the rio central is the lack of a built in hard drive. this is easily rectified for another $100 but why don't they include this??
for that money (actually a good bit less) i'd rather get an Audiotron. this is just an expensive cd/mp3 player with the ability to suck music off onto a user-added hard drive. no network either. pretty lame product if you ask me.
edit: looked at their website some more and thought about the product some more and realized how ULTRA lame it really is. to get my mp3s with the artist name/album/song name/genre listed, i have to rip my audio cds using something on my computer which interfaces to CDDB, load those mp3s onto a SPARE hard drive i just happen to have around, and then install that hd into the unit. to load new mp3s onto the device, i have to open it up, install it in my computer, etc etc. WHAT A HASSLE!!
but its interesting to see how many of these products are coming to the market lately...
wayne