I flew CMH-ATL-NRT-PEK last June to take advantage of the 772 flat-beds. The return was PEK-SEA-MSP-CMH with a 763 cradle seat, which, frankly, sucked (though, of course, I realize it was better than anything in the back). I bought an M and upgraded using miles; as I recall, the M fare was about $4200. (In fact, there was cheaper J fare but I couldn't take it due to company policy. Their money, I guess.)