I think the airbase called Dumayr which was attacked long time ago by tomahawks im not really sure which one, but as far as i know that T-4 and shuairat are the main airbases for SU-22, su-24 attack planes as i heard from RT Reports on youtube
you will have better performance in all games not only in dcs.
but if you just save some more money and go for an i7 it would be so nice.
SSD will improve your pc speed and loading time etc.
and the new generation of graphics are amazing "series 10"