I’ve had a chance to check out Mvix’s products before, and they have just announced the Ultio Pro media center. It is designed with 1080p decoding and network media playback from a PC or NAS. It is designed to support most media file formats including MKV, WMA, ISO files, as well as PlayOn and UPnP.
The Ultio Pro is available for pre-order, with a basic version selling for $169. The $348 version contains 2TB and includes a PVR.