Mach 6.5 is eventual target. In 2010, it was said that a new facility is planned to be established to get 12 Mach speed.
http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=defense&id=news/asd/2010/11/22/10.xml
So, my questions:
1. Can we compare to Russian, American and Chinese...