If you think you can cope they sound fine! Just be aware of the work load that comes with these subjects, I took Maths because it had always been my strongest subject at GCSE and I enjoyed it since I did well in it. However, when it came to AS Level I flunked it really hard. What I'm trying to say here really is make sure you have a genuine passion and interest in the subjects you pick because for me I discovered I didn't like Maths at all, what I actually enjoyed was being good at maths and that wasn't enough to get me through my AS as the workload of it combined with my other subjects meant I just didn't have the time to succeed in maths and put in the effort I needed to pass. I remember when I was reading advice when I picked my A-levels and just thought 'I got an A in Maths at GCSE without revising, I'll be fine' so I hope you take this advice a lot more seriously than I did when I was younger.
Another thing I would say is if you have an idea of what course you want to do at university you could potentially pick a 'softer' subject as a backup in case one of the more difficult subjects is too much for you, realistically most universities only care about you having 3 A-levels, and out of those most universities either want UCAS points or they want an X grade in (insert subject here) and two grades in two A-levels that don't necessarily have to be relevant unless you are applying for an elite university.