As a Sukhoi fan, I would be remiss if I failed to lust after the Berkut. The Su-47 is a "fifth generation" fighter that combines extreme maneuverability and thrust-to-weight better than 1:1. While a large aircraft it still boasts some outstanding performance (top speeds quoted between Mach 1.6 - 2.3, depending on the source). The Berkut has captivating lines with its futuristic canard/forward swept wing configuration. I use a small metal model of this brute (mounted on a stick) during my pre- and post-flight briefings, and I never tire of looking at it twisting and turning through the class room.
The April LOOTM, the Sukhoi Su-47 "Berkut".