Here is a great read about why winter tomatoes don't taste like "real" tomatoes. Take a minute to read through this article; it will certainly motivate you to buy local and organic. I had no idea that there are 110 different fungicides, pesticides, and herbicides that are allowed to be used on tomatoes grown in Florida, many of them being some of the worst chemicals on the EPA list.
Just another reason to buy local and in season. A great way you can save some of your summer tomato bounty is to dry them. They will keep many of their nutrient this way and can be used many ways through the winter; in pastas, on pizza, as a pesto, or even pureed into a bean dip!