So it would appear that accruing with AF/KL would be the smarter choice since I would rather get rewarded on my transatlantic travel. However something occured to me ... security. Would I be allowed to use the priority line at security with my AF/KL status in the US on a domestic flight? I would tend to think not. Maybe I should just do both AF/KL and CO.

I know that I would accrue points quickly on AF/KL because its over ten hours to CDG from SFO I will not be torturing myself in tempo.