Mostly a personal opinion ofcourse, but heavy phones suck. The hand gets tired after a while especially if it is one of those monster phones. Even the HTC One X is actually plastic, they just refined it.
By heavy I didn't mean weight wise, but rather like...quality wise. It's a nice material, not cheap plastic-y looking plastic.
I actually like the build quality of the HOX. But then again, I also like the build quality of the Lumia 800 (800? 900? I forgot).