While I am not a fan of PSIM in general I am a fan of unified platforms that have a baseline strength (lead by a major component such as video or access) with many integration and developmental options. I am not sure that there is any such thing as an "out of the box" PSIM, becuase of the development that usually has to be completed for your environment.
That being stated, I think that innovation dies in the government. Though I am an integrator, I applaud what Michael Vidro is doing, and this is being done because he is spearheading it. But today they have some developers and tomorrow what happens when they or Mr. Vidro leave? The government is not a sustainable product. Technology changes so quickly how do they propose to stay on top of that? They can leverage manufacturers of subsystems to stay on top of a lot of the technology changes, but then someone needs to stay on top of those subsystems changes.
Not to be discouraging about it, but it seems that when government employees set up these types of solutions, they are setting themselves up for long term "consulting" contracts to keep these programs going.