I never plant more than one hill of any tomato (so no separating and saving at my house). Your success rate for tomato production (The whole point to growing tomatoes), would be to plant as many varieties as you can fit into your garden. Then if a few fail to produce, you have plenty more to fill the gap.
I hope you are looking at the length of season for each variety you are considering and comparing that to the length of your growing season. You are in Zone 6a and I am in Zone 6b. I will be starting my seeds on April 1 to plant out by June 1. Look for short season varieties; they will do best in your climate.
Unless you are canning your whole crop (Can?
), look for indeterminate tomatoes. They grow HUGE but produce all season. Determinate means the whole crop will be ripe at just about the same time (but the bushes are smaller).
Daisy