This jaunty little powershell profile will give you a multicolor prompt, and will change the username red when your running in administrator context.
Are you sick of notepad? Here's some great tricks to tweak gvim for windows to act like the vim you love.
Other than downloading the latest version of gvim, you should also get vimtweak.dll here:
Once you've installed gvim, to set up a _vimrc file: