Motorola Atrix HD vs HTC One X
I would get the Motorola Atrix HD over the HTC One X any day especially when getting locked into a 2 year contract. Better file management and offers an SD card option. (if you have a One X and have to get a replacement or upgrade into a different device then you have to save all your info (like pictures) to a computer or Bluetooth them over as opposed to just removing the SD card from the HD and putting it into the replacement.
If you got the upgrade then go for the SIII, itís BEAUTIFUL. Or if you can handle a bigger device the Note II. Both are awesome phones.