Well I depend heavily on UF for advice with plants. Here is what they have to say:
There are numerous atemoya varieties; however, few have been critically evaluated for an extended period of time. The most satisfactory variety under Florida conditions has been 'Gefner', which does not require hand pollination and produces fruit of good quality. Fruit production of 'Page' is good but fruit tends to split on the tree at maturity. 'African Pride' ('Kaller') and 'Bradley' usually produce few fruit without hand pollination. 'African Pride' fruit may develop internal disorders upon ripening. Other varieties such as 'Bernitski', 'Caves', 'Chirimoriñon A', 'Chirimoriñon B' and 'Chirimoriñon C', 'Hette', 'Island Gem', 'Lindstrom', 'Kabri', 'Malali', 'Malamud', 'Mammoth' ('Pink Mammoth'), 'Priestly', and 'Stermer' have not proven viable for commercial production. The selection of superior varieties in the future is highly possible due to the numerous seedlings that are under evaluation in public and private collections.
So, it looks like a Gefner is what I'll be looking for, unless I hear differently on here.