i think nintendo wii is the best cause its interactive and its the least expensive. its also the only console which can be modded. 360 and ps3 have almost the same functionality. the 360 is cheaper than ps3, but it has the "red lights of doom".
but its ur choice really. if ur into graphics, then get a ps3 or 360. if u want family games and interactiveness, then take the wii.