[PlasmaKrab]

If I get rid of the Su-47, what is going to replace the Su-27/30/34 beyond 2010? I just like the design of it, and there was this icon already available. Note that, as with the MiG-39, the production fighter isn't necessarily identical to the concept demonstrator. The S-37 Berkut is only an aerodynamical base, while I had in mind a slightly lighter and less stealthy Su-47. The number 47 is as good as anything else.
Regarding the PAK-FA, I've been thinking about it for a while. I'd indeed need some light fighter to replace my MiG-35 by 2015-2020. For now I was considering something similar to the Sukhoi T-50, maybe smaller, but thanks for the info, I'll see what I can make of it.