Help pls what's the best walk around kit lens.

Hi, I own the omd with the 12-50mm kit lens and the panasonic 25mm + the Olympus 45mm. I want a walk around lens that I can use in day light and that does not cost much. I am disappointed in the 12-50 and would like you opinion on a replacement. I can not justify the price of the panasonic 12-35 so I was thinking about the panasonic 14-45mm, what do you think?

Thank you.
E.