[tacticalogic]

Even if you want your desktops Windows, at least put the email, calendaring and file sharing on something other than Windows.

Do you maintain the users in Windows, or something else? What the solution for managing single sign-on, and getting the the "other than Windows" to recognize Windows security principles for access control?

[antiRepublicrat]

You have never heard of a heterogenous infrastructure, have you? One very large network I know is a combination of Windows, Sun and Linux.

Apple has also put a lot of effort into making OS X work seamlessly with Windows. Simple workgroup networking between my Mac and my PC is easier than between two PCs.