Just one thing about the Ramjet Hypersonic Aircraft, how exactly are you going to get the craft fast enough in the firstplace to be able to use the ram jet engine, as you have to be going at supersonic speeds, Mach 1.4 atleast, for the air compression effect to work. Sure the first pic shows a Booster but From what I can see it is just like the booster engines on the shuttle launch system, so when you want the RJHsA to come home you can't without replaceing the booster, if its a one shot wonder, or add even more fuel to the craft hence an increase in all up weight which would diminish the carry capacity of the craft.
In my opinion it would only be usefull as an attack craft, fighters and bombers, however the USAF has allready scraped a hypersonic bomber, the Valkyrie, but heh what do I know, I'm only british.