Even if AT&T was my network, and I've contemplated going back to it (my wife is on it anyway), I could NEVER get the One X.
Now, if they gave the X a 32GB or SD option, I'd consider it, but 10GB of free space is a joke and insulting. 16GB was Apple's biggest storage option in 2008. And here we are with 64GB options and HTC/AT&T have this laughable slap in the face.
Now, not everyone needs more than 10GB, but if you do, you can't do anything about it.