OK, I'm reporting back like I said I would
I finally solved the 'network like' problems. The symptoms were netwrok dropouts for a few seconds when reading audio from the disk with an internal buffer of about 2 seconds. When the snap didn't respond longer than this, the audio cut out and the radio station sounded like crap.
I am not sure which of the three checkboxes I removed did the trick, but I unchecked (in Microsoft Networking -> Advanced)
- Enable Master Browser
- Enable Opportunistic Locking
- Enable NT SMBs
This may have been a no brainer for someone that knows what's going on, but I didn't have a lot of time to read up on these things. The NT SMBs I know least about so naturally I want to blame this setting. I would do more testing, but this is now in a production envrionment, so I'm not going to mess with success.
It looks like the snap is working perfectly

My only gripe is the lack of an instant power on - We will be investing is a larger UPS.
oidar