I do not think either question can be answered objectively, since perspectives and priorities vary. So I will simply offer this anecdote - Two years ago, a friend and I were perusing a local jewelry store. Another customer glimpsed my DRSD franken and called me out on it. To make a long story short, the store's watchmaker "cracked" the watch open for us and, low & behold, there sat a nice, genuine Rolex 1575 beating away inside the case, right next to its HeV.
In my case, since gen Rolex parts will always increase in value, why cash-out if you do not have to? Or, at least, that is my conclusion. Your mileage may vary.