Well this has turned into a spirited debate. Now that ATT will give me 50% off on any of these phones, waive the activation and credit my account for the CA sales tax, it evens the playing field with Amazon. And I'm also guaranteed my current plan is grandfathered when I order the phone.
After spending time at an ATT store with a very knowledgeable Atrix owner, he emphasized that if I really want a phone that will get the JB update and has a ton of development, the GS3 is probably the best choice. And yes, I'm not wild about the blue tint on AMOLED screens, but it is a nice phone. And when a launcher like Nova is installed, it should correct some of the funky parts of TW.. For $100 it seems to be an awful lot of phone.
Meantime, a local electronics chain here in the Bay area has the AHD on promo for a few days for $39.99 which really detracts from its value. It also has me wonder if the build components are super cheap and may not last too.. Hmmmm