Sell the NTSC one, save yourself a lot of time and money by not having to import games and get a converter, RGB cable and ****...
SCART cables also gives a better picture quality than the NTSC ones that come in the box with the US PS2...
BTW, you can\'t play american and japanese games on PS1 without a modchip or a game-enhancer...
And you need to get a RGB SCART cable as well to play NTSC games, or else the picture color will be black and white
So to close up sith, YES you do need a modchip for your PS2 to play all region DVDs, NTSC games and backups.