i've never travelled iberia... where did u fly with them? i flew us airways from here to SF coupla years back and it was adequately pleasant but nothing spectacular, and i dont like those american embraer jets for flights to ny. cant remember if ive taken delta, but i know i took united many years ago.

air canada is fine for short flights, like the one i took to halifax but i didnt like it much on the flight to frankfurt and back.

ive flown klm upto amsterdam/munich and back once and it's definitely one for the top of the list.

others ive flown include gulf air, oman air, air india, indian airlines, deccan airways (all of these are based either in the middle east or india) and while not the best, were pleasant enough - except deccan which i recommend avoiding.

kuwait airways used to be the cheapest and most popular choice from the middle east to the uk/us and they were really nice then but i havent flown them recently.

id like to travel with emirates and qatar airways asap, since they're vying with each other to become the best airline in the world...