My first year WAM was 93. I'm in third year Sci/Eng at UNSW and my overall WAM is 91. I've scored all HD's plus one D with two 100's. I have heard of an Asian student in the USA with a GPA of 9.9, which is equivalent to a UNSW WAM of 100(I've checked out the course and done the calculations).
There was a guy in 1953 who graduated from Harvard at 16 with an average mark of A- who reputedly had an IQ of 230. His name was Sidis and he died destitute, friendless and penniless. The person with the highest IQ today is Marilyn Vos Savant with a possible 220 and she lives in New York. She doesn't talk to anyone who asks about her intelligence and has promised never to take another IQ test. It seems the world has a history of treating the highest IQ's very badly. Don't be so keen to race to the top - it's not how big your marks are, it's what you do with them that counts. Remember, Bill Gates was an undergrad dropout.