[ispgeek]

[Joke]
I would like to know how you attach your tv to the synology?
[/Joke]

the purpose of a NAS is to store files, not to watch/read/play them
so it is not possible to install xbmc on your ds411

I disagree. Synology has DNLA functionality, but their Media Server is lousy. IF it had been good, I would connect my TV to the network and stream movies from the NAS to the TV.

What I want to do is replace the built-in media server with one that works, I have tested TvMobili and Plex but not yet reached full functionality.

Logitech Media Server is the one who has worked the best but it is very unstable.

Honestly you don't know what you're talking about. The Synology media server is awesome and fast. Where people run into problems is they exceed the capabilities of SMB shares by trying to stream Bluray over it instead of using DLNA which works just fine. There are data transfer rate limitations on shares (by design and NOT Synology's issue)) apparently nobody reads the specs before trying it. Let us also not forget the yahoos who seem to think they can buy a $25 router and get it to stream reliably ...no...it doesn't work that way....get the proper equipment and a decent media streaming appliance(s) and do things right and your Synology will do you right every time. Cut corners or just be a noob about it and yes you will be very unhappy.

I stream movies all over my network from both of my Synology units both standard and bluray and have no problems at all...