You can add my favorite to your short list: Gemini from CounterSoft.
It is based on .NET and simply requires Windows IIS / SQL Server, works in all browsers (even for some of our clients running under IE6, and supports MAC boys!).
There is no AD support yet, but it has enough flexibility to help you configure it so that you quickly accept users. By this I mean, define your screens, set up shortcuts on the screen, workflows, metadata for each project, nested versions (for your sprints, etc.).
Oddly enough, one thing that really matters to us is built-in editing: in-place editing when viewing problem lists, simplification for daily meetings, etc. Reporting is basic, but we went into our own custom reports (by creating simple ASP.NET user controls).
We used it with SVN and it is fine, but now switched to TFS Source Control and Gemini still works well with it.
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