I'm evaluating Visual Studio productivity addons for my development team, which includes some folks who are very new to C# and some folks who are very experienced. We don't use VB.NET. I personally like ReSharper, but before I suggest something that I personally like, I would like some opinions for and reasoning behind using a different addon.
Given the choice between ReSharper, CodeRush, and Visual Assist, which one did you choose and why?
For discussion, do you run more than one addon at a time? Or one not on this list? What are your thoughts on these addons?