The example is not really the option. Its an only an example. Its just which is your first priority on buying a computer a Good Card, Good CPU or average. For me I choose C because better card are better for games. And also its easier to upgrade when you choose A or C because you dont need to change both VCard CPU and MOBO.
I would probablly got with A and update the video card when you could, but if you are keeping this for a while definetly go with B since it will probablly be the best overall system
I prefer A. Because while its true I love to game, and love to have my game run at the fastest speed I can... I only game about 5% of my computing expirance. A better CPU, will do me more good for other things I do.