Just pay attention to the versions of the game you get. Vanilla NG3 is pure trash as far as i know, and NG3RE fixes the combat (most of it anyways), while also having ayane, kasumi and momiji in it, For NG2 and NG1, it will depend if you have a ps3 or a 360.
you had before doa x2. and Gow 3... Nah, i'm joking, you play what you like, but i guarantee that a single NG game alone will give you more play time, fun, and rage, than both of these games.
I have NG Black, 2 and 3RE, 2 is my least favorite of them all so far, but that is only me, i've spent too much time with ng3re already, and maybe that changes when i reach the same with ng2, but black is undeniably awesome.
he means NG for the xbox. The vanilla version. NGBlack is a special edition of that, it is a xbox game that runs on the xbox 360. And there is also a remake for ps3, called NG sigma.