unity serve vtuner

Hi, am currently using a SBTouch into the Ndac/xps2 on a 252/300  based system and  enjoy the internet radio a lot. Apparently the Nserve has a Vtuner of some sorts?built into it so I could eliminate the both the Touch and ripp all my cds hence eliminating the cd player as well. Having searched through most places I have not been able to determine which Vtuner (latest v5 perhaps?)comes built in/activated in the serve let alone the fact that it even has one.Are there differing models/types of vtuners in the naim range or is it just later versions, your thoughts would be appreciated,