My opinions:

B747 is in a class by itself and is the best plane flying today.

A340 is better than the B777 (4 engines, 2 across in Biz, etc.)

A330 is better than B767 (Just more comfy and better all around)

A300 is better than B757 (not sure if they are same class because A330 is twin isle)

A320/319 is better than B737 (more room!!)

Basically I think that Airbus has really kicked Boeing's butt recently and the order sheet is testament to this fact. The only thing I don't like about Airbus aircraft is the whine the engines make when they begin the takeoff roll.