Most of my travel with be domestic based, possibly 1 Asia trip and 1 trip to Europe per year. I'm looking mainly for upgrades - pay or not pay. Which programme is best for me? Home aeroport has full service of both.

I've flown NW FC to Europe once and was very impressed; never flown CO.

Will do about (actual) 50k miles per annum on this programme.

Which programme is for me?