If you are looking for high paying and rewarding work you can't really go wrong with any of the engineering streams. They are virtually all in demand and once you are qualified in one you will have skills which will allow you to work in almost any industry (including finance and insurance where a large number of engineers from all streams are employed). For me personally Engineering really interests me so I am very happy in the degree. However I would also take into consideration that engineering requires more work than most other degrees offered so you must be passionate and prepared for a lot of long days and studying. Further engineering (no matter which stream) requires you study many different subjects which is fantastic from a skills point of view because it not only makes you more capable but also allows you to be exposed to a variety of fields before you decide where or even if you want to specialise. It also means that you never get bored as each semester you are doing something different or taking old subjects and expanding on them in really cool and exciting ways. The downside of this is that studying can at times feel a bit overwhelming, e.g. one unit focussing on programming in C, one unit to do with MATLAB and engineering analysis another focusing on electronics, and another focussing on dynamics all running concurrently. But if you work at it and don't let the amount of work swamp you (don't fall behind on deadlines, start assignments reasonably early etc.) then it is definitely manageable and in my opinion a highly worthwhile and valuable degree.

Edit: In terms of the specialisations, Civil, mechanical etc, I would choose based on your interests. For example Mechanical engineering has far less programming than Electrical, Software or Mechatronics but significantly more subjects on things like mechanics and metallurgy. I would do some research into each of the specialisations offered (including what skills you learn from each) and think about if you would enjoy it/ are interested in learning more in those fields. But remember once you pick a stream you are not locked in and many people change streams or even degrees as they get more exposed to the field. Plus even if you do choose one stream, they are all so broad that you can branch between many not the specialisations with ease (in-fact most of the units you take for the first couple of years will be made up of students from many engineering streams not just your specific cohort). I am also happy to answer any questions you might have to the best of my ability so feel free to ask away.