In my school we use New Century, it is pretty good at getting the point across and teaching you, but I quickly got bored of it and my teacher gave me a Cambridge textbook (I got too far ahead of the rest of the class by about an entire topic) and Cambridge I think it better for teaching the applications of what you're doing.
Though I also have the HSC excel book which is really great at going through each concept step by step. Makes life so much easier.
So if you're just looking to learn rather than be challenged, go with New Century.