Variety/companion garden question

[nnjjohn]

I am wondering now if I should grow a variety of tomatoes instead a dozen of "burpee" big boys and a dozen of "burpee" super beef steaks? I am going to home depot today to see about getting Sungolds cherry seedlings and potting mixes for my pots.. is there a forum here how to get the most variety of tomatoes in small residential around the house gardens? I usually grow in total about fourty plants.. should I consider planting more varirty ? Like perhaps half a dozen of each kind? Are all tomatoes good companions..also, are cucumbers and swisschard and basil okay for companion in a tomato garden? tia , John