Hey there,
I had a look at that link, and they are definitely good prices. Just need to remember to add the fitting and balancing costs.
When i needed tyres (in Adelaide at the time) i phoned 9 tyre shops and went with the best price. The range of prices were $285 to $360 each. Bob Jane happened to be the one i went with.
So jump on the phone and get some quotes.
In my case, Bob Jane fitted and balanced would still work out cheaper than if i used Ozzy
Cheers
John