Nathalie

I use Tom Tom on my smartphone aswell as google maps ( which also has turn by turn navigation) google sometimes has it wrong but it's got nice features ( such as traffic) and is free. Tom Tom is good but doesn't look as fancy as maps. If you have a smartphone get a holder for in the car and maybe try out maps first?

Plenty of casual games available for mac, but still many popular games ( shooters, mmos) are only available on windows. You can install windows on your mac but many wont find that easy to do.

It depends on your most important criteria. If money is not one of them, the iMac is simply the best hardware wise and you get good service. If budget is important then manufacturer is all the same to me, might aswell go for one that looks good. If you're a gamer you may want to go for a random windows machine.

Telstra has the best coverage everywhere. I'm on the payg cap+ plan and decide every month how much I want to put on the card. For $30 you get 400mb of data and $300 of calls, which can be international as well. It suits my needs. If I need more I can top up or go for a higher cap. Example: the $60 payg top up gives you 3gb of data and over$900 to spend on calls. In think that's an extremely good deal. Downside ( for some) is that you have to have your own phone ( it's an upside for me) which could mean you have to pay a couple of hundred up front to buy a handset.

coming from Holland where they incidentally make the best mayo in the world, having lived in the UK for 9 years and thus dealing with the english crap all that time, I can't imagine it being worse!