EPL-1 vs. EPL-2 vs. EPL-3 -- Value?

I have the epl2 only in an oly housing with the Zen dome. However, I tested the epl1/2/3 in stores. The epl1 with original kit lense feels slow. The upgrade to the epl2 is well worth it. The epl3 is slightly faster than the epl2 but not near the differenc

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