Sukhoi T-50
Say what you will, the Russians design some good-looking aircraft. However, given the size of their economy, I would not be too alarmed by this development, since they won't be able to afford many of these either. China is another matter - they also can beat the US on cost, and can probably produce many more J-20's than Russia can Sukhoi T-50's. The problem for us will be when they sell these aircraft to our adversaries.