Visual Studio Express Vs Standard Vs Professional

We have a several developers at our company, and we are planning to use Ogre for some upcoming projects. We currently have just the express versions of C++ and C#, but we would like to get the tools that are best aligned with the current state of OgreDotNet and/or Mogre. I think that Visual Studio 2005 Standard is the best choice, but thought I would check with the experts to be sure.

2005 vs 2008?
Express,Standard or Professional?

Thanks