You do realize that the M14X is a laptop and the iMac is an all-in-one desktop right? Comparing the two, if you look at specs, the alienware is best, but they are both for different uses. Since the iMac is a desktop it will be much more enjoyable(if you can get Minecraft on there) to play because of the larger screen etc. but then theres the factor of portability. Honestly I think there needs to be some type of edit in the question. Im not sure if this is more of a latpop vs all-in-one or an alienware vs apple because the form factors of both computers are different.