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Yes Bobby, it's the lenses that I wish Olympus would improve on. Granted, there are some really stellar primes (and I have a few), but where I feel they are really lacking is on the wide-angle side, both primes and zooms. I'd go for the 7-14 but the show-stopper for me is the natural inability (ie, no "rigged" apparatus) to accept filters. I shoot a ton of landscapes too and use ND filters as part of my kit.
Don't expect to get 14mm equivalence and filter compatibility. I'm not currently aware of any zoom that wide that accepts filters. The 14-24 certainly doesn't and IIRC neither the Sigma 12-24 nor the 8-16 do.