Motorola Reveals Atrix HD Developer Edition
Smartphone allows for near infinite customization options due to unlockable bootloader.
Motorola has announced the Atrix HD Developer Edition, which delivers the same specifications as the original, but allows for an endless amount of customization due to an unlockable bootloader.
The bootloader itself allows users to install custom ROMs on the phone without carrying out any additional hacking. Subsequently, the smartphone's owners can considerably modify Android's look and feel.
Motorola, of course, won't allow users to unlock the bootloader without voiding your warranty first. Either way, though, those ordering an Atrix HD Developer Edition won't be too concerned with the warranty.
The Atrix HD boasts a 4.5-inch screen with a 1,280 x 720 pixels ColorBoost display, a dual core processor clocked at 1.5GHz and an eight-megapixel camera with full HD recording capability.
Other features include Wi-Fi, Bluetooth 4.0, microUSB, 1GB of RAM, 8GB on-board storage, a microSD card slot and a 1780mAh battery.

I would still go with the Atrix HD over the Samsung Galaxy SIII even if both were the same price.
The UI on the Atrix (and Motorola in general) is the most pure version of the Android without being a Nexus phone. The construction, the bright screen, the non-fingerprint-magnet body, the speaker and audio quality makes it my choice... the camera is crappy... but its a camera-phone camera... oh well.
I don't know why all Motorola phones are not Nexus branded phones since Google owns them.