you will trade your 3919J for 5119J. If you want any justification, here it is: obsession for perfection. There is no financial logic in what you intent to do, but neither is there in buying PP watches. Go for it and cure your dilemma. In case of dilemma, action helps better than thinking. And forgive me for giving such an advice regarding the current economical situation of our poor planet.
Sincerely
Ahmet