The richness of the better true cherimoyas, and the great differences among true cherimoya varieties, are hard to approach within any other single Annona species, or within the "atemoya" category of Annona hybrids. You need a collection of several other species to approach the gourmet pleasure you could get from growing a collection of cherimoya varieties where they grow well--- not here!
Though I bred the '48--26', a.k.a. 'Lisa,' I agree that 'Geffner' is far more likely to perform satisfactorily.
Be aware that some lists, including the Sarasota list, contain varieties of Annona hybrids which are not properly referred to as "atemoyas."
"Atemoyas" are Annona hybrids containing both Annona squamosa (Sugar-Apple, or Sweetsop, or Ate, or Anón) and Annona cherimola (Cherimoya, "true cherimoya"), and NO OTHER species. Annona hybrids containing other Annona species should not be called "atemoya."
Annona hybrids that are part Annona reticulata ("Reticulata" or "Custard-Apple" in Florida, Bullock's-Heart, Corazón), or part Annona diversifolia (ilama, or papauce), should simply be called "Annona hybrids", but may also be referred to with their own specific hybrid names:
"Cherilata" for part cherimoya and part reticulata;
"Temoylata" for the 3-species mix of sugar-apple, cherimoya, and reticulata; etc.
When one joins a group from many places talking about Annonas, the conversation can easily bring recollections of Babylon--- novices will even call soursops "atemoyas"; Brazilian's have several names for Sugar-apple, depending on the town; Cuban's often call Reticulata "cherimoya", and several other Annona species get called "cherimoya" elsewhere; Australians tend to call all Annonas "Custard-Apples;" and so on; and erudite botanists keep splitting the genera in this family, and then lumping them together again.
Har
PS: Where the "true cherimoya" is from, the valleys between the ranges of the Andes, the Quechua language is spoken. Because many cherimoya varieties have "mamilate" skins, and because the fruits are not from the animal kingdom and therefore are not warm, they are called "chiri moya" = cold breasts.