ferrari or fiesta? i don't see it that way, esp when the 1.8 focuses so much faster and is lighter, to me that sounds more like a ferrari, but it certainly does price out more like your analogy. i've never used the 1.2 but have studied it pretty extensively. i have the 1.8, and while it focuses fast, i've never really been all that impressed. i wish i had my 100mm f2 back instead. i find the 1.8 to miss focus often, and it's got a large amount of purple fringing on some things. for me the 1.2 looks to focus to slowly and is too expensive, while the 1.8 just doesn't wow me either. I'm waiting to see a sigma 85mm 1.4 ART materialize.