I haven't been doing this long so I will say that I have done. Most of my engine selections was basked on the weight needed to balance the plane with the equipment where I wanted it. Sometime this has lead me down a road I don't like having to have a lighter engine than I could find. What I don't want is to get a plane/engine combo then have to put lead in the nose or tail.
Is this not of any concern or do todays engines have enough power to haul around todays monsters of the sky!