For us Brandywine never did well and it's been over 10 years since I've tried it. It just doesn't grow well in the hot climate here. Kellogg's Breakfast handles the heat quite well but doesn't require it. No tomatoes require Texas heat.
25' separation should be plenty for tomatoes. There are some out there who believe it should be more but the majority are okay with 25 feet. Good luck in your 2015 tomato garden!!
