[Hampshire] Network Attached Server/Domain Controller.

Hello Folks

I have been asked by a friend to deploy a NAS/Domain Controller on some old hardware for a small realty business (I dont there access from outside the LAN is needed). I think I know whats required:

Samba
BIND
Debian

I have something running successful here in my home but was wondering if there was a better plan. Ubuntu Server for example.

Any suggestions gratefully entertained.

TIA
Mike