Thanks for all of the imput. Always great to hear the opinions of the Flyertalk community. The decision was the Zurich PH. As mentioned here the decisive factor was the ease of flying into and out of ZRH from LHR. I guess I can put up with a bit of the cool Swiss service style when the offset is the efficient Swiss transport system.
I have never been a fan of Malpensa and much prefer LX to AZ.