XBMC Linux on the XIOS is actually really nice. I moved to a win 8 NUC for XBMC but I can see the appeal of the XIOS, especially for the price. Don't know much about Dune except for the lack of Mac support, few places to buy it and pricing. Prefer the PCH family though both Dune and PCH seem to have a bleak future given the inability to secure premium streaming rights.
Inability to secure premium streaming rights? Dune, PCH and Mede8er are media players for streaming your ripped movies and TV shows. They aren't going to include Netflix, Hulu, amazon, ect. That's why you get a roku box or a HTPC. Dune, PCH and Mede8er have been in business for a while. I don't see them going out of business any time soon.