Moodiejeff:I love it, someone with the Great Barrier Reef on their doorstep and they're going to Coz! Enjoy your trip!
I'll go you one better - I have the incredible Ningaloo Reef on my doorstep...beats GBR by a mile IMHO and I can pop out for a quick 60+ minute dive over a long lunch and be back at work in under 2 hours...or more likely I just spend most of the day out there!
Thanks for the heads up on the car hire...I am hoping someone will say "used such and such as was really happy".