Please understand that the Internet is not and never will be a parallel for any other communications medium. It is not analogous to cable TV, it is not analogous to the PSTN, it is a completely separate and unique entity that has nearly single-handedly revolutionized the world socially, financially, and politically. The linchpin of this success is the free and unfettered delivery of data from one point to another. By allowing quasi-monopolies to control whether or not that data is delivered is a most horrible idea.
Please note that I am not talking about bandwidth caps or levels of service; I am talking about the fact that you wish to sanctify the actions of large corporations to deny their customers the right to request information from a third party at a whim, to essentially make large swaths of the Internet inaccessible unless both their customer and the third-party site pay a fee for that information. This goes way beyond putting tolls on the roads; this is the same as allowing gangs of thugs to patrol the highways, shaking down travelers however they see fit. Add in the simple fact that in many places there is only a single broadband provider, and you are essentially giving that provider the right to hold the Internet hostage to their own customers. Yes, their customers can certainly cancel their service -- they aren't required to have Internet access -- but that directly conflicts with your own statements regarding innovation and investment. Without customers, there won't be much of either.
Further, large ISPs have a habit of increasing rates for those who order a la carte services, such as Internet without phone and Internet without TV. They can and will develop pricing plans that make it difficult for dissatisfied customers to use another Internet provider (assuming there is one) without breaking the budget or losing TV service.
I understand that the big carriers are against Net neutrality and would love nothing more than to provide Internet access in a similar fashion to cable TV. It would be a big boon for them. It would also be an unconscionable betrayal of the American people should it come to pass. The big carriers have been given more than enough time (and simply massive amounts of government funding) to build, maintain, and grow their networks. High-speed data equipment and infrastructure are faster and cheaper than at any other time in history. This is the time that we should be working to provide the benefits of high-speed Internet access to those places in this country that are still without it, not trying to impose arbitrary and costly limits on those lucky enough to already have it.