Olympus OM-D 12-50 or 14-42

It's not super sharp, but it's OK and it's versatile. If, like me, you can put up with less than ultimate sharpness on a carry-round lens, it's good. Just have more lenses (or another system) for the occasions you want real quality.

I'm thinking of getting the 12 mm f2, which could be a sharper carry-round lens, but the versatility of a zoom starting at 12 mm makes the 12-50 (especially bundled with the OMD) really good value and a useful option.

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Rens
There are optimists and there are realists