I used to average between 4K and 6k per month on ANZ Visa gold, and occasionally up to 8K, and it wasn't until I read the threads and realised I was only getting .5 ff after $2,500 that I changed cards. I now put everything I can on Amex Rewards Max, and W'worths MasterCard when Amex not accepted. Everything is now covered. I would rather deal with a point for point exchange rate than two for one etc.
ANZ Rewards Visa has an special for customers who apply online and who are approved by 15 December 2005 and activate their card by 5pm (AEST) 15 January 2006 will receive 16,000 Bonus Points.
However, be careful as it also states:
Earning points
In any monthly statement cycle you earn the following points on purchases made using your Classic Card (excluding cash equivalent transactions):
One point for every dollar up to $1,500 spent.
One point for every two dollars over $1,500 spent, up to and including a maximum monthly spend of $5,000.