It's nice to see that the daytime flight in/out of YVR (CX839/838) will be operated by the the 747-400 once again starting July as I much prefer the extra space and shorter flight time compared to the A343s. My question is will this flight have the NBC by then? According to the CX website, the flights will be using '744'. Not quite sure if this configuration is the NBC or OBC. Would anyone recommend upstairs or downstairs for the seating? Any input will be helpful.