If I were you I would buy the Wii compoment cable and just use those to hook up to your TV. You could then set the Wii to 480p resolution - slightly better than the 480i resolution you get from the composite cable.
Does anyone know how to hook up a WII to a samusung LED tv, I already have the rca jacks in use for another device, will the USB connection work? is there a possible HDMI cable crossover for a WII? thanks. Gregz