IMHO, you won't need the DUNE. The 103 plays MKVs with virtually every mainstream codec, including HD audio, when streamed via DLNA or via connected HD. Thus, one can use a very low-powered NAS or PC/Mac as a DLNA server as zero transcoding/remuxing is required for 100% bit-for-bit quality from Blu Ray or DVD backups. This is a major difference compared to most other Blu Ray players that only support specific container/codec combinations that can require significant software tweaking on the server end or significant CPU horsepower for transcoding. For example, I was able to stop using a PC as a DLNA server and now use a bottom-of-the-line Synology 212j with it's included Media Server to serve everything via DLNA to a 103. It just works.
Don't let the 103 thread scare you----the setup for the 103 is actually quite simple and comparable to other Blu Ray players just with some additional advanced featured options if desired.
One very strong hint: if you plan to serve HD MKVs via DLNA: use a wired connection. Wireless can work, in theory, but that planets must be aligned for consistent results.
A second hint: the 103 uses Cinavia protection for physical discs, thus a direct copy of a Blu Ray played via disc will not work. Ditto for full disc backups in the BDMV folder structure. This is because the current restriction covers the BDMV licensed directory structure. Thus, MKV and M2TS containers are not an issue as they currently are not included in the BD licensing requirement. Obviously, as with anything, there is no guarantee that this will remain the case forever.
Edited by bluechunks - 6/22/13 at 8:49am