Just because there's so many listed, which of these would be considered top tier "must haves" in your opinion?
Any additional rootstocks that are geared towards growing in the desert and higher pH clay soil?
I can ask Hershell tomorrow to see if he is aware of any that may be better suited for higher PH clay soils, ive seen reference to Cleopatra if you are going to be grafting your own trees it may be a good option.
As for top tier must haves it depends so much on your tastes. Are you looking for lemon, lime, navel, orange, mandarin, kumquat, grapefruit, pummelo, or just odd and interesting? Theres too many to just rattle all of them off but a solid list of a few of my own favorites: Kishu Mandarin, Shiranui Mandarin, Gold Nugget Mandarin, Sugarbelle, Armstrong Satsuma, Brown Select Satsuma, Cara Cara Navel, Dream Navel, Cameron Lemon, (everyone starts with Meyer Lemon), Persian Lime, Chulo Key Lime (more productive key lime), Crassifolia Kumquat, Fukushu Kumquat, a Limequat, Genetic Dwarf Grapefruit, (Golden Grapefruit when we release it), Tarocco Blood Orange, Hamlin Sweet Orange, US119, Chandler Pummelo or Tahitian Pummelo and for fun ones I like Vaniglia Sanguino Acidless Sweet Orange, US942 (shockingly good when ripe) New Zealand Lemonade, Sanbokan, Australian Red Pulp Finger Lime.
There are more of course but thats a relatively solid general list.