Buk-M2E...Ah yes, the SA-17 "Grizzly", whose launch vehicle looks sort of like the SA-8. I wasn't really thinking medium-range SAMs, but I should have been, and this would also be a great addition.
Cik-1-The one I'm really thinking of (S-300PMU-1) isn't able to fire at targets THAT far away. 2-I guess it wouldn't be all that useful to have them, but I think it'd be cool. Plus, if aircraft like the Su-30SM, Su-35S, F/A-18E, and Eurofighter got added (presumably just for AI), they'd be realistic.