Wide(ish) Prime comparisons?

[Deep Fried]

How would you rank the wider M4/3 primes? I'm thinking about 12, 14, 17 here. Are there any big differences in focus speed? Does one stand out as dramatically sharper, or better in some way? Is there one that is clearly superior?

 

[Pancake]

Used the 14 and 17 and have to say the 14 is very fast at focusing and to my eyes seems very sharp even wide open. I do like the 17mm focal length but I would choose the 14mm out of the two.

 

[Hacker]

The 12mm is a little gem of a lens. But the 17mm is small.

 

[Benjamin Marks]

I like the 12 a lot - not a lot of distortion or fall-off, and very speedy. I know that Ctein slammed it on The Online Photographer, but the lens works great for me. I don't like the 17 that much -- it has not seemed as sharp as the Panasonic 20 and the focal lengths are close enough that I don't use the 17 that much. I don't have the 14, but am tempted because the price is reasonable and the write-ups have been good.

My carry-kit is the 12/2; the 20/1.7 and the Oly 45/2, with legacy lenses for longer focal lengths. Still using the Olympus E-P2 (x2) and loving it.