Skypoint, your car is prewired for the fogs, most of the cost is for software upgrade so your on board computer recognizes the new feature.
I would get the fogs, as I find the foglights give you a wider perimeter of light to the sides, hence picking up any paint reflection.
And I agree with your comment of better appearance.
If I remember correctly, Volvo just came out with a better lense cover which won't break so easily from road debris and stones.