I want to buy an xbox as my laptop cant deal with playing Final Fantasy XI online anymore. Im not sure which xbox to go for. My kids use their old ps2 so they wont be using the xbox much. Im really not sure if i need the 20 or 120GB hard drive. I have been told i dont for Final Fantasy but i dont want to make a mistake. Price is also important. Also can Final Fantasy XI be played online on anything else? the slimline PS2 - PS3?