Agreed with Artaxerxes.
I think that Inquisitors and their elite retinues are very unique persons. Therefore, I'm not fond of an "Inquisitor", or "Interogator" career. I think that "template packages" (skills opportunities, influence, duties and drawback) you buy with experience points over an additional advanced career would provide more options. With a template system, you can build, psyker primaris interrogator, adeptus arbites judge inquisitor or explicator, and so on...
You can also add more variability with alternatives packages: Radical Inquisitor, Corrupted Explicator, etc... It would be like Rogue Trader Origin path options.

