Using a US PS2 in New Zealand

[MJHH1]

Hi

I'm living in the U.S. at the moment and want to buy a PS2 to play our American DVD's on. In a years time we will move back to NZ. Can you tell me if we will have any problems using a U.S. PS2 (which I presume will be NTSC on a NZ television which is NTSC playback capable). Will we be able to play our US DVD's and NZ DVD's on the same machine by using one of those region free CD's to change regions as necessary. Any advice?

Mike