1. Brisbane (if you like it mild in Winter, warm in Autumn and Spring and boiling in Summer - over 40 - 45 Celcius - don't walk barefoot on the road or beach or you'll scold your feet. Put a black steel plate in the sun for 1/2 and hour and you can easily cook eggs or steak with no fire under it!)
Sydney - Winters down to 8 Ceclius - real jumper weather, Summer up to 35 - 40 - perfect beach weather, Autumn Spring mild - 25 degrees
Melbourne - 3- 5 degrees cooler than Sydney
Sydney is more an international class city - population 5 Million, beautiful waterways (I think Sydney has produced 5 of the best 10 pro surfers in the world over the last 20 years + plus best harbour in the world bar none), slightly hilly, 7 * 24 city, Brisbane pop 1.2M - lovely clean modern city - more layback lifestyle, flat with very few hills, 1 hour to gold coast, Melbourne - Pop 3M - more a ball sports lifestyle city
2. Great IT industry - very high tech and modern - best jobs and best availability would go Sydney, Melb, Brisbane. I'd expect wagers to be higher in Sydney by 20% then Melb and 25% than Brisbane.
So a skilled team leader / senior techie might earn $120K per annum in Sydney, a manager $120K - $140K, Snr Mgr $160 - $180K, General Manager $200K - $400K etc...
www.seek.com.au
3. Three Bedroom house prices
Depends on location, distance to city and water, conditions of housing
Sydney $300K - $600K - most over $500K AUD
Melb - 30% less
Brisbane 40-50% less
I am a Sydney sider - worked in all capital Cities in Australia - love Sydney the best!