DVD-DL is quite expensive, so if you plan on backing up X amount of games (some of them are multi-disc too remember), then just in terms of money the xk3y can work out to be cheaper, not to mention more convenient (no need to buy a special burner, no need to drill a hole into the PCB for certain consoles). If you are no stranger to collecting things online, then you probably already have a few powered hard drives around.