Those two are pretty good textbooks, although personally I prefered exercises from Arnold as I found them to be more difficult (at least the ones near the end of the exercise set). Just make sure you do plenty of the simple exercises to minimise silly errors, and sufficient difficult questions at the end of the set so that you are ready for the HSC.
Personally I don't like Coroneous, the font gets irritating to look at after a while. I suppose they offer good exercise to practice on.