Video Conferencing Tool

Hi,

  I am in search of a Video Conferenceing third party tool to be incorparted into our new application asp.net 2.0 with c#. After a long serach i found some tools that match my requirements. Those are as follows

Can any one suggest which is the best product out of these? All can have the ability to copup with Dotnet and will support RED5 , Flash Media Server and Wowza Media Server