Most any beefsteak variety should produce well for you IF planted at the proper times for growing in your local climate.

Because of the heat and humidity and the condition called blossom drop (see the FAQ here) that they cause, fruit set is all a matter of timing. For most Florida growers those proper planting times are very different than for many of us - check out some of the discussions linked below - so you may wish to consult your local county extension office to find out exactly when you should be planting. ;)

In northern Florida, some growers say NOW is the time to plant and that using the large early varieties can improve your odds. Other maintain that your very early spring will be the best planting time. Either way, you have to get them to a productive/blooming stage before the heat and humidity come on in your area.

Dave

Here is a link that might be useful: Growing tomatoes in Florida

I agree with Dave - especially in a warm climate, much of it is timing. If plants are set out late (for your spring crop), they might not be productive for reasons he already explained.

Akers West Virginia is one beefsteak type I can think of that is usually productive and dependable for me when planted on time for my area. For me, that is no later than early/mid March - your "8b" might be a wee bit different. Some other general suggestions might include Indian Stripe, Dora, and Green Giant.

For fall crop, I usually stick with cherries, early-mid types, or ones I've personally had previous success with in terms of their apparent heatsetting ability. Those in southern 9b + climates tend to have a lot more leeway for their fall/winter crop choices, and might even prefer to grow their "main" crop during that time. Much of it depends on when you get your first frost.