I would like to fix both front teeth. Dental bonding or veneers? (photo)

I think that you can get by with just the bonding but you would have to go back after sometime and get them replaced. And on the other hand veneers is a more permeant solution.

My personal philosophy is that I would like to do the least amount of dentistry to achieve the desired goals of my patient. If your goal is to just address the one chipped tooth, then dental bonding will be my recommended treatment. I rarely recommend one porcelain veneer because it is very difficult to get a perfect color match when only addressing one tooth. 
If your goal is to address both teeth than my recommendation would be to have two porcelain veneers. Even though veneers require more of an initial financial investment, they have many advantages as compared to dental bondings. Veneers will look more life like, they will last longer, and they are more color stable. 
If you are concerned about jumping right into veneers, you could always have the bonding completed first which would address your immediate needs, and then you can always do veneers in the future.