Wilt is a good possibility. My fist thought was 2,4D drift when I saw the pictures. Tomatoes, Roses and Grapes are hyper sensitive to this class of herbicide. If you have done any kind of weed & feed program to the you may want to consider that possibility. If wilt is the cause, and likely is, simply selecting a wilt resistant tomato variety is easier than mioving the garden. Ask the local garden center next spring for advice on the right one for you and your needs. If you have a couple different varieties out there right now it would explain why some are healthy and others are suffering.