Let me start off by saying that I am a boobman through and through. I love big, shapely breasts. It's just how I'm wired.
Despite my obsession with amazingly huge titties, I think natural almost always trumps fake, simply based on the fact that fake ones can be so horribly butchered. Additionally, much of the time fake breasts carry with them some form of social stigma (at least in some people's minds) -- that the owner of said enhancements is somehow compensating for a lack of wit, charm, or personality all around. But, like some posters said above, if you feel strongly about it and find a good doctor, breast augmentation can be beautiful and fulfilling.
Plus, the technology is just going to keep getting better. At a certain point, it's going to be very hard to tell the difference between fake boobs and real ones because the surgery techniques will be so advanced. Technological progress also means less risk of health complications.
And last thing:
If you DO decide to get augmented, PLEASE PLEASE PLEASE find a good doctor who is skilled enough to preserve sensation in your breasts. I can't tell you how big of a turnoff it is to be going to town on a gorgeous pair of hard nipples, only to have the girl not enjoy it at all 'cause she can't feel anything.
Peace, love, and big titties.