Really the hot weather increases the acidity. I lived somewhere that had like 26 of 30 days over 100 degrees. 1st time in my life that I had to eat fewer tomatoes cause they were burning the inside of my mouth.

I like celebrity, jet stars, early girls , and maybe a plant or two of better boys if I plant a bunch. I don't really life the beefsteak types. But I used to have a garden with about 50-60 plants so I'd throw in a couple big ones.

As far as best it depends...but for sandwiches I like smaller varieties I mentioned. Less white hard cores.