Joomla or DotNetNuke or Drupal ? Clone www.httpwatch.com

I want to deploy a website which should clone? <[login to view URL]> We are 100% Microsoft shop with Windows 2008 64-Bit server with MS SQL and ASP.NET I am trying to determine what will be right fit for us, given that we are 100% Microsoft company, I am inclined to use DotNetNuke, however I don't want to miss out if Joomla or Drupal will equally for us ..? So this project, I want detailed quote (a) Which one should be used (b) What it will take to clone? <[login to view URL]>, same skin (c) ? No content writing needed, only navigation of few pages .. may be 5 (d) Should have appropriate JS and CSS