I've always had either LG or Moto for my phones (not that I've had a great deal of them), so I don't know much about HTC or Samsung. I do like the looks of the HTC, though.
Don't forget, Motorola delivered the Droid X with a locked & encrypted Boot Loader (that much, I can forgive), but they also *booby-trapped* it with an eFuse that almost ruined my Droid X. I had a friend, who is a real life cellphone tech/electrical engineer repair it, and it took him six hours to undo their act of terrorism. The eFuse serves no function other than malicious nastiness, and is truly a criminal act, IMO.
Think about things like that, the next time you consider a Motorola product.
-Mike