I have an SCT Xcal2, the screen is kinda small and hard to see. The range of which I can change things is very limited, and I have no ideqa what the base settings are. On the upside I can datalog with it, and it is pretty fast. I also never have a problem finding people who are reputable and able to work with it, and I have lived in Cleveland, rural Michigan, and no Orange County, Ca.
I don't have a Diablosport, so I can't help you there.