Winter, you are so wrong about the aircraft proposed.
The design of the aircraft is completely feasible. Your idea of 'the engines are on the weakest part of the wings' will not hold up to squat as well as the flat boxed nose of the model.
and here is my proof...
http://www.aerospaceweb.org/aircraft/recon/sr71/sr71_schem_01.gifThe main wings has a reinforced titanium boxframe spar in the wing that holds those two huge engines to the main body. And they are on the 'thinnest' part of aircraft Oh, and did I mention that the aircraft has an unclassified speed of MACH 3+. And it is still considered one of the most advanced designed aircraft of this century.
As for your boxed nose idea.... all you have to do is look at the F-117. It is a faceted aircraft. There are no 'soft edges' on that aircraft anywhere.
So, before you start denying the idea of 'futuristic' designs, take a look at modern and development aircraft before judging what is feasible and isn't.
I can tell you all the things that your Stilleto class interceptor is incapable of doing in real life which would render it a useless interceptor of anything over MACH 0.9
Regards....