NT4 - 2003 Migration Best Pratice

[TheTechieGuy]

Hi

I know this question has already been asked about 9billion times, but i though i would ask

Heres a little infor on our setup

All Server running NT4

None of the hardware will be getting changed as we are running
2 x Dell Poweredge 2400 and 2 x Dell Poweredge 4600.

PDC Running Wins, and File Sharing,
Member Server running Exchange 5.5 and DNS
BDC running on it own i just installed it, no services running NT4 Terminal Server and Citrix Metaframe 1.8


I am planing on upgrade to win2k , exchange 2k3 and Citrix presentation server 3.0

What is the best route for upgrading the PDC, BDC and The Mail Server.


Thanks for any advice