That's a very good question. I am a son of a senior judge of high court and what I have seen or learnt from my experience is that the judicial service is an excellent service.
Civil judge is extremely powerful, legally and constitutionally, and there are no political pressures on him. I wish I had been a lawyer so I could appear in judiciary examination.
But still I say that it depends on one's own preferences too. I like administrative job so I prefer PAS over judiciary but as far as the legal and constitutional powers are concerned there is no match between the groups of css and judiciary. Judiciary is far superior. My list of preferences would be like this:
First PAS, then judiciary and then police and afterwards all the other css groups .

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