Sup VCE notes

This week at school we had a thing called 'course councilling'.. Pretty much 1 hour and a bit getting informed about next years subject choices [Year 11]
I've definetly got these subjects in mind:
Mathematical Methods CAS
Advanced General mathematics (has a topics that will strongly help with specialist mathematics)
Physics
Chemistry
English Language.
Theres one problem though :F
I can either drop 3/4 Psych [Note: I will have completed 1/2 this year] and pick up 1/2 or 3/4 Biology.
I don't know if its the same at every school but you can skip straight ahead to 3/4 Biology. [I have the choice of doing 3/4 Bio in year 11]
I was just wondering, if I do choose 3/4 Biology, will I be in a major disadvantage and do poorly in the 3/4 unit? My teacher said if i did choose 3/4 Biology i'd have to do a lot of reading over the Christmas break [Thats fine with me

]
I don't want to choose 1/2 Bio ( in year 11) because I'll have the biggest work load in year 12... Physics, Chem, Eng, Methods, Spec +Bio if i choose it.. Where as with Psychology I'd have a little more experience which might help with the 3/4 unit.
Ultimately, I can choose 1/2 Bio and ditch 3/4 psychology, or pick up 3/4 bio, without doing units 1/2 and ditch psychology, OR JUST KEEP PSYCHOLOGY.
Math methods, Advanced general, biology [3/4 or 1/2], chemistry, physics, English. [Spec in year 12]
OR
Math methods, Advanced general, Psychology 3/4, Chemistry physics, English. [Spec in year 12]
P.S I find that Biology is more interesting.