Given the way you want to grow it - hanging upside down - your choices will be limited and your production will always be limited. Try Tumbling Tom or Totem.

Dave

You could try husky red cherry, patio, golden nugget, rosalita pink grape, or another variety that stays shorter. The only problem with growing in a container is that your tomatoes will only do as good as you take care of them. So make sure to fertilize often, use a good soil mix and make sure they're watered properly so you'll get better production.

Sugar Sweetie is a good variety for hanging. Heirloom cherry, does well in hot weather

Other than Cherokee Purple, I don't stake my toms, so I choose determinate/semi-determinate varieties.

I'm trying a new hybrid by Bonnie called "Excellence" this year, but I doubt they'll compare with my heirlooms.

I'm posting a link that's a good source of seed for determinate heirlooms. "ugly tomatoes" I've heard them called. Ranging in color from yellow to black (purple) and green! Gorgeous!

Here is a link that might be useful: TomatoFest Heirloom Determinate Tomatoes