Samba as member to NT PDC

[Castellanos, Leon]

I am currently in the process of setting up samba for a EMC clariion
storage solution connected to a Sun Ultra 60 running Solaris 8.
I want to use of the NT PDC on our network for authentication and 
want to know which branch is the best suited for this purpose:

Samba_2.0
HEAD-Branch
SAMBA-TNG or
HEAD with TNG

Any information would be greatly appreciated.