Russian aircraft are great performers, but if LOMAC has even a touch of realism to it, they're not very easy to fight in compared to an F-15. I especially like the Mig-31.. it's just ... mean. Look down/shoot down, 80k ceiling, mach 2.83 capable, phased array radar, data links, & 10 AAM's.
Bottomline though, stealth is the future of ariel warfare. With about 3/4 of modern kills being with radar guided missles, if you can only see them for the second their weapon bay is open (and only if your radar is pointing directly at them when it happens), all the high alpha manuvers in the world won't save you.