You're right, it probably is " The Amazing race". I assume it's series 10. Which is pretty cool, as I'm a fan of the show. The idea of travelling the world & doing strange dares sounds really fun.
Oh, and the host "Phil" happens to be from NZ (like myself). Although on the show, he appears to have completely lost his kiwi accent.
So if Series 10 includes a 2 guys with asian appearance, with grey/Kharki patterned backpacks & the show does go to Manly (Sydney)? Well then I definitely saw a TV show in the making