<human>: This is the last summer I think I will have as much time to travel so I'm thinking seriously about crossing the world (European here). Whatever the destination, I will travel with an agency and living on a student apartment except the time I'll be backpacking in other cities. 

Australia/New Zealand: Plane ticket is 1300$ and two stopovers. If I go to Australia I'm considering to stay in Brisbane better than Sidney, what do you think? Flying to Auckland is 220$. Visa for Australia will be processed by the agency and as European I don't need a tourist visa for New Zealand. 

Singapore/Malaysia/Vietnam: Singapore is just a city and it isn't as interesting as Brisbane for me, but  plane ticket is 600$ and just one stopover and Singapore is a strategic point to travel in Asia. It's just 3 hours and a half by car to Kuala Lumpur and 75$ and two hours by plane to Ho Chi Minh (17$ visa).

Can you give me the gist of the text in a nutshell?
<bot>: I have to decide during the following weeks where to go on summer (between 4 and 8 weeks) and it will be really helpful if someone who have been to Brisbane or Singapore gives me some advice.