beetkvass, there are some resistant tomatoes for Georgia listed here:
http://extension.uga.edu/publication...own%20Tomatoes
If what you're doing isn't working, all I can say is keep changing it up until you find what does work. Rotations, cover crop mulch (plant fall rye then cut/kill it early spring and plant tomatoes into it), better nutrition, better spacing, pruning and/or support.. I manage my tomatoes mainly with sanitation practices, and nothing reduces maintenance like thinning the number of plants and leaving lots of space between. Maybe grow somewhat fewer tomatoes for a year or two if disease buildup seems to be the problem.
For sure it is a good time to be growing organically, because there is a lot of effort to make it work at a farm scale now, and solutions to those problems are being developed and shared. I know Georgia climate has special challenges but you have lots of organic farms now; those people may be able to give you the best advice, how to manage disease and avoid using sprays if you want to.
