I appreciate your helpful advice,
I will be moving the controllers and hard disk drives at the same time to the new server.
I plan to get new SCSI drives in near future, due to budget constraints I could muster only one server machine. I have disk cloning software already I will use it to clone disks. My main concern is to avoid the hassle of years of configuration and migration work done on the server, running DNS, AD, FTP, MAIL. Although FTP and MAIL are not tied to AD in my configuration setup, using third party softwares for that. I'm hoping to update the 'HAL' configuration by doing an in-place upgrade of windows 2000 Server.