Using Windows 2000 DNS in an NT domain

There are no real advantages (other than the increased stability of Win2K over NT4) to upgrading your DNS server to Win2K. It will function as a standard DNS server (just as your NT4 DNS server does.

You would only gain some advantages if you changed your Ddomain to a Win2K Active Directory (AD) domain. In AD, your DNS servers have an additional mode called Active Directory-integrated mode, whereby all DNS zone information is replicated as part of the AD replication. Any AD Domain Controller that has the DNS server service installed will receive all DNS zone information as part of the normal replication.

You should exerience no problems specific to DNS by conducting your upgrade.

I find there are a lot of advantages to moving to 2000 base DNS.

In addition to stability issues, DHCP and DNS and WINS integration is much better under W2K.

You may want to setup a WINS /DNS /DHCP server under 2000 and integrate DNS and DHCP so that you may use the DDNS features of 2000 and get away from WINS has it will eventualy be removed from Windows Network.

Also the 2000 DNS is better integrated and has less compatibility issues with other BIND DNS.

The W2K DNS is easier to manage.

Look at articles that discuss DDNS /DHCP /WINS architecture and take you time in deploing a well thought out architecture as this will give you less problems in the future and will permit you to integrate more easily with other architectures ( read Unix/Linux, Mainframe )
Also this will pave the way for Active directory integration in the future should you wich to go that way.