Depends on how often you can go on EK F going forward considering the AA deval. I'd say if you can do EK F within 2016, do QR now because itll be much pricier soon. Otherwise, do EK F.
That's the problem I'm grappling with. I've got a load of AA miles, which I want to use for my summer Thailand trip, before the deval. but the problem is I can't find any F space whatsoever. And for J, I only found CX, and now this.