Why does it have to be Russian or US?
European ---> Gripen, Mirage, Rafale, Eurofighter, Tornado etc...
Anyhow the next one is US. So, they don't have to listen to us (except from bugs to the current sims and minor wishlist arguments). They are listening to their contracts though ;) If you are going to fly in DCS environment, expect nothing less than 99% accuracy.