Sorry mate, the Raptor. Newer and the plane that is replacing not just the F-15, but the F-16 too. The things it can do are SCARY!! Add all the aeronautical advantages it has, then you have the stealth factor too. The US doesn't do that many things well, but when it comes to military we are the nuts.
And don't take that as a knock on the Eurofighter, it is a very, very capable plane that bests almost everything in the sky.
Actually got to see a squadron of F-22's land at Hickam Air Force base in Hawaii, then saw them parked up on the tarmac. Really awesome things to behold.