Should I do A.mus? :S

[saysesame]

I've done piano for 12 years, now in year 10. Problem is that although I've spent so much time on piano, I am not planning at all to get into a music-related course in Uni.  , or let alone do it for the HSC.
Right now I've spent around six months prepping for A.Mus but I am hating my Chopin and Brumby pieces. I feel like I don't enjoy it as much as when I did my C.Mus last year and get really frustrated sometimes Now I am undecided as to whether do the exam in September or concentrate more on school instead. What should I do?

[will]

Fill out the following -

Taking Exam
PROS________________________________________________________
CONS________________________________________________________

Not Taking Exam
PROS________________________________________________________
CONS________________________________________________________

Decide from here.