WP isn't that bad IF you can get KLM flights to AMS. I travel to Amsterdam quite often and find that most airline business classes are pretty much the same to de Dam. The kicker is which type of aircraft are you going to get.
I've flown UA 777's (very nice plane), US 767-200's, NW/KLM 747-400's and once a Sabena A320, then a US FF partner and I really prefer the Boeing aircraft. Anyway you shouldn't have too many issues with KLM, but avoid NW if possible. Toot Ziens.