Hello, I have some experince with 2005. I attened an open event for the 2005 product family and what i saw impressed me the new features are designed with productivity in mind and they have listern to what users would like to see.
BUT.... it all depends on if you think you will use the new features, I am looking at upgrading with 2006 because that gives time to look at the new features and train staff on there use. Also we are running NT4 severs still (yes i know only this year left) and i had problems with profiles with it!! had to get a new profile.
So what I am trying to say is have a look at the features if you think they will be helpfully (the view maanger is what i am very exited about), and think do i need these now or can we work them in over time and develope new working methods using these tools....
sorry i have babbled on abit and proabaly did not help but i hope i have if you want more spacfic info let me know.
martin