That is not a good reason. How do you want to ride? Are you looking for long range comfort, or do you want to hammer as hard as you can? Set the saddle fore / aft position to a point where your feel balanced on the bike. Forget about knee over the pedal. You should be able to lift your hands off of the bars without falling on your face.

After the get the fore aft set, then you can work on the reach to the bars with stems and bars.