It's sad, but this isn't really an interesting argument any more these days. Even as a staunch java supporter, I wouldn't try to argue Java is in and of itself as good as C#. I'm more interested in how the 2nd generation JVM languages (Scala, Groovy, etc) compare with C# or the other options on .NET, and on the pros and cons of the whole platform and ecosystem.

For my money, no matter how good C# is, I'm not willing to be tied to an environment where the only full, modern implementation is tied to a single platform.