In actual use I have run all 3 types of axle shafts.
In 1985 I went exclusively to Rzeppa joints in my Dana 25's.
I ran them with Power Loks and had zero problems
Very soon I'll be converting back to Dana 30's and Spicer type joints.
It's my opinion that Rzeppa shafts are the absolute optimum for anyone with D25 or D27 steering axles.
IMHO the Bendix are the worst.
Desireability pretty well follows the maximun steering angle specifications.
Bendix = 23*
Spicer = 27-1/2 *
Rzeppa = 29*
Bendix and Rezeppa are constant velocity type universal joints. The single Spicer Cardan cross is not a constant velocity design.