Upgrading Domain Controllers From 2003 to 2008 - Suggestions

Hello All,
Now this may be a loaded thread, but I wanted to see if there were any suggestions on best practices for upgrading my current domain controllers to new 2008 machines.  Currently I have about 20 servers, some of which are 2003 and some of which are 2008.  I have 2 2003 DC's currently and have 2 brand new 20087 machines ready to be deployed as new domain controllers. One of my current DC's is DNS and DHCP as well, WINS is not in use.

So, what I am wondering - are there any issues that would arise from the switchout?  I've done a 2000 - 2003 upgrade in the past, and had ran into some odd issues at that time.  Any suggestions to make the transition as easy as possible would be greatly appreciated.  I have no issues with haveing all 4 servers running in parallel for some time

Cheers
JJ
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JamesonJendreasAsked:
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Mike KlineCommented:
Take a look at this question I helped with, has steps and links to some really good guides

http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/Windows_Server_2008/Q_26358376.html

One suggestion I'd have is go to 2008 R2 at this point if you can.  Do you have any trusts with NT domains; that could be an issue but hopefully you don't have that :)

Thanks

Mike
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JamesonJendreasAuthor Commented:
No trusts!

Thanks for the link, I'll scroll through it to make sure I got all my ducks in a line!
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