I've enjoyed the Olympus 9-18mm on my OM-D. I've thought about the 7-14mm a few times, but the range of the Oly is so enjoyable that I've held back on the 7-14mm. But I'm still so very interested in the wider AOV for landscape. I know that the Rokinon/Samyang is very sharp, but how do the corners and edges hold up after defishing changing to Panini projection? I'm not particularly interested in the fisheye look (though it does have its place). If the non-fisheye resolution is good enough, I'd seriously consider adding it to my arsenal. Thoughts? Suggestions? Opinions?