CX has F to JNB for now. However, air route.net has been reporting that as the 744s are phased out, the flight is to be operated by a 3 class 777. (that's a No F version).
I dropped 140K for SEA-SFO-HKG-JNB-HKG-LAX-SEA in F on CX. Other than the leg HKG-JNB where I ended up in J due to the changes in A/C it was all F, and cheaper miles wise than EK in J.