Generally, the benefit of organically raised foods is that they don't have pesticides or herbicides, potential toxins. In some ways, they might not be as nutritious because a food that's been fertilized and protected from weeds and pests will yield a bigger fruit or vegetable. But there's the risk of it carrying along herbicides or pesticides. No, you don't need to buy expensive oils or difficult to store oils. Olive and canola oils aren't that cheap, but they're good oils.
Flaxseed oil is a good source, but it's somewhat expensive.
My vision of the future is that there will be plants engineered to increase the nutrient that we feel is the most useful or beneficial. For example, we see certain strains of oats and barley that are being engineered to increase their levels of soluble fiber. Out of a high-yield oat hybrid we get maybe three of four times the amount of soluble fiber that is in a regular oat. One of the concerns we have is that we don't know what the benefit of a whole food is vs. the nutrient in that food. So it might be that if you change the balance of a nutrient in a food, you change that benefit.