I like both the white and the brown background. Before I saw Ashwin's version, I thought a black background would be good too (a real one not in PS) but now I think brown complements the colors of the flower very well.
Anyway, for a picture like this, unless you are doing so kind of graphic work for a brochure or magazine, I think there is absolutely no reason to shoot and then change the background later in PP. You can always go back and shoot again! Of course we are having fun here but I am saying this in general![]()