Your photos are definitely good enough Kym! I voted for the Porsche in Northbridge :-) My gf is mates with one of the guy's who has 260+ votes...he's spamming all his friends' facebook pages regularly for votes. At the end of the day the judges choose the winner, not the one with the most votes.
Just double check that you're allowed water-marks on them because I'm sure the rules asked for no watermarks...? (for publishing reasons)
I've got 4 photos entered but I don't hold out much hope either