I did a portrait. First I rendered using Deep shadow mapping time 5mins. the result was very good, then I used Raytraced shadows the result was Amazing!! (Render time was 4hours though! 3 hours of that was her hair! ) 
In conclusion, Raytraced shadows for my image incerased the quality enormously, but it sure took a long time :)

If it ain't free, I can't afford it.