I heard ppl saying that rgb cable has better picture quality then the normal av-cable (red,yellow,white).Is that true so its worth to buy an rgb-cable?Will all the games run fine with it i mean for example,will i ahve some black white screen on some japanese or us game???And one last question about vga-box for DC.Are they really compatible with all video cards (nvidia,ati)?Do the games work with this hardware or many wont work?THANKS in advance for your answers.