Doctorate from UNISA or SATS or UP?

Which school would you recommend for a postgrad degree? I would like to one day teach in a college, university, or seminary. I have a BA in Biblical Studies from Southeastern Baptist Theological Seminary. I also have completed an MTh in Systematic Theology from UNISA.

In regard to hopefully being hired one day, would it be looked down upon to receive a second advanced degree from UNISA? Would it be better to have the diversity of attending a different school for a doctorate? Also, in regard to the specific degree type, would it be more marketable to have a ThD (from UNISA) or a PhD (either from SATS or UP)?

 

I'm guessing that, in general, Pretoria would be seen as the most prestigious of the 3 schools but on the departmental level that might hold true.