Have to say I was a bit afraid I'd really like and want the Droid X ... I  am a longtime Moto fan and the phone just seemed perfect ... boy was I  wrong. (Warning: personal opinion ahead...) There is no comparison  between these two phones. 
The Droid X is GIGANTIC in comparison to the  DInc, for starters. Build quality (which I expected to be better than  HTC) was the same or worse. The physical buttons on the bottom turned me  off (can you say grunge collector?). The deal breaker for me though was  actually USING the phone. HTC Sense is SO FAR AHEAD of Blur or whatever  Moto calls their UI, it's pathetic. The Droid X was not nearly as  responsive to my swipes, and the screen paled in comparison to the DInc.  For _me_, hands down, the DInc is the better phone.
Was also hilarious listening to a VZW sales rep push the X over the  DInc. Are the DIncs still out of stock? That would explain it. He  basically raved about the X and was less enthusiastic about the DInc ...  but when they asked him what he was using ... it was a DInc. 
-kj-