Thanks guys! Just wanted to know if it was reasonable or not.

I'll mention it to my teacher this morning and, as someone suggested and I'd already thought myself, we can make a final decision in late March about a fortnight before registration deadlines. I looked through the tutorial book the other day and it seems to teach all the required notes and scales etc for G1 viola, so it doesn't look like it's too high a standard to aim for.
I don't mind the idea of exams as they make one work - esp. this one!!

Also, I'm told they're rather good for string players as it makes you work on your scales, which are rather crucial for us.