At this point, i'm looking into the northeast corner of Texas, but as you say, who knows. No place will truly be perfect, as the green is only a part of what we're looking for. As it is, my wife lived in major metropolitan areas for the first 28 years of her life, where green is at a premium because of all the brick and mortar.
However, as you say, with a little more looking around, perhaps we can find some place. Florida's on the radar, too.