there is an arcadea pro
and an elite
i'd stay away from the arcade. doesn't come with a hdd which you will need for a lot of games. comes with wired controllers (which isn't the worst thing in the world)
pro and elite have a hdd, wireless controller. elite has a bigger hdd i think (mine has 60gb, i believe elites may have 120) and is black. some of them may come with a universal remote as well (like your TV remote).
chevs just seems like a great deal to me, because i believe they sell for 400 new, and thats without an extra controller or games.
i'm selling mine as a bundle btw. i dont want to be stuck with games and shit and spend the time to sell them separately. i am also in no hurry though.