As an aside isn't the A-12 a very 2nd generation 'stealth' LO. I'm guessing F-22, F-35 PAK-FA and J-20 would be grouped as 3rd generation.
Therefore what ever it is they want in 2030 probably won't use current LO solutions, maybe multi-spectral 'cloaking' devices will be available by then that allow more freedom for aerodynamic flair?