Thanks for all the information and opinions everyone! I'm not looking at physics too much because the teachers have made it out to be the hardest science subject, and as for Bio, i'm only really interested in the 12 course so I'm thinking if I could pick it up in year 12 instead and do my own...
I'm picking my subject right now. I'm considering this list
Eng adv
eng ext 1
Maths
maths ext1
Software development
Japanese beginners
Biology
Modern history (this is in my reserves, but i want to pick it up as my 14th unit so i can back out of maths 3 u or adv ext1 any time)...