Panavision Primo Primes are the ultimate lenses. They produce cinema film quality imagery that will blow you away. The contrast range is perfect because you have all of the highlight detail, as well as wonderful gradation into the shadows. They flare beautifully and have a greater depth of field than most still lenses. However, the best attribute of the lens is that focus pullers know how to use them and will deliver in focus imagery.
Be aware of the large sensor in the Canon 5D Mark II camera. The widest lens that does not vignette the sensor is a 35mm.
What is your favorite lens to use and what did you notice about how it performed on the 5D Mark II?