As the title shows, I'm thinking of getting a walk around lens and both prices are around the same. However, I might get 200$ off the Tamron due to the presence of 2nd hand lens. The question would be: what's a good walk-around lens? I do have a wide angle already, hence I'll be looking for mid range. I plan on buying the 70-200mm VC USD later, so I guess telephoto's not the issue. Everyday usage is what I'm looking for. Budget dictates that I choose one of these. What would be my best option?