Yes, the Viggen is not an obvious choice and might not appeal to the "masses" but it's a very capable aircraft.
While it was not on my "want" list i am not disappointed.
The US paint is available: http://www.digitalcombatsimulator.com/en/files/1374729/
Edit: it seem there's a cockpit mod as well ( http://www.digitalcombatsimulator.com/en/files/1374710/ )
IF these are really their upcoming aircraft, i am quite happy in fact.
The Viggen would be a nice change of "style" and the Corsair is a must have WWII aircraft. I would buy both of them and hope they would release an opponent for the F4U in the future.
I don't know if it helps, Cobra, but if i press the escape key the FPS becomes normal (i can see the PoV moving smoothly with TIR). returning to the game kills the FPS again.