Are my IB HL options a good idea??

All of the subjects are relatively similar in their approaches - logically approaching an issue, simplifying it and working out a solution - which is a good thing. This means that even if the subject matter doesn't overlap, the methods you use for learning, revision and answering questions will. With that combination, I would definitely recommend SL maths - maths is an important component of each subject, especially physics, so would really help you out. If you're unsure about computer science then perhaps taking maths at HL and compsci at SL would be better?

Your grades would appear to indicate an ability to do well, provided you work hard, although your maths grade would be a better indicator of success. Taking film would be a significant detriment, as it is nowhere near as well respected as your other options.