LAX NRT: you get QF F lounge. (How much are you gonna eat before a 12xx departure).
NRT LAX: you get sushi, sake, and a decent EXPRESS security lane. and better food onboard. (again, how much are you gonna eat before a 17xx departure)
NRT lounge is brighter. LAX is good because the common area is sh!t.
anyways, is the OP doing the other leg in C, W, Y or *A