Hi all,

I've signed up for the American Express Premier Rewards Gold card, and I'd like to have an account with each of the major alliances that I can transfer its points to when I want an award ticket. (I've already got Delta Skymiles since I live near DTW.)

So, which of their OneWorld partners would be best for me, out of British Airways, Iberia, or Cathay Pacific? I'm not looking for status, just ease of earning and redeeming points (both for tickets and upgrades). Most of my travel would be U.S. domestic with the occasional trip to Europe. I'm a bit leery of the 1.25:1 exchange ratio with BA/IB and BA's taxes and fuel surcharges on transatlantic flights, but I'm intrigued by their low redemption rates on AA domestic flights. I don't know much about CX but I hear AsiaMiles are pretty versatile.