This is question that is more complicated to answer than you would think. Basically, you need to try artificial sweeteners and decide for yourself. Also, I would never recommend using that much sugar OR artificial sweetener in just the morning!
I have found that cutting out the sweets in general (and often the starches like rice, potatoes and bread) has been very good for me. You could try slowly weaning yourself off most of the sweets by switching to sugarless coffee, fruit in your oatmeal...that sort of thing. Definitely at least try cutting down on the liquid sugar to a minimum. You may also find that certain artificial sweeteners are yummy while others are gross. Try a few.
Basically, the ideal would be no sweetener. But, the next best thing is less sweetener. Some people do not react well to artificial sweeteners and end up eating MORE calories. Others do really well on artificial sweeteners.
Two years after starting to improve my nutrition, it is my sweet tooth that still causes problems. Much smaller problems than before, but they are still there. For me, artificial sweeteners are helpful in limiting the damage!