I have Johnny, Tex, and Raquel. They are all fantastic, but I use Johnny and Tex the most because they have more texture and feel more real. Between those two, Tex is my go-to toy since it is a great, average size, but Johnny is great for those times I want to feel more stretched.
I had ordered Randy at one point, but it was entirely too large for me. Seeing it in person is quite different from trying to envision its size. It's freakin' HUGE (diameter-wise)!
I am very interested in adding Buck to my collection at some point, though, and perhaps Lone Star and/or Goodfella as well.
I had the hardest time deciding between Lone Star and Johnny. Those two are the same length and diameter, but Johnny is curved while Lone Star is straight and they have differently shaped heads. In the end, I went with the curved toy, which is why I ordered Johnny. Still, Lone Star looks great . . .