Time to brush off this thread. Another resource - sprite for MiG-31 Interceptor, for the 'real man UFO challenge', where it would replace the Interceptor. 20 damage cap (jetfighters really can't take Plasma...), and 1750 knots speed. The best extreme-speed interceptor the real-life humanity had since 1970s... and still the best in 2015.
F-22/Su-27s could complement it - with speed of 1200 Knots and worse weapon loadout, but some Dodge and +5 Health, so they could try swarming UFOs and maybe survive for a bit.