depends on what you want to do with it
if you want a Vanilla Android experience, and DON'T want or know how to mod a phone
go with the Nexus. ( i hate Samsung, but this is basically Google's phone)
if you want the slickest/smoothest interface out there, that can do everything you want. go with the EVO 3D
i have had HTC phones since before they were cool. went to a samsung phone last time, and hated how shitty built it was.
i am back on the EVO 3D, and couldn't be happier!
it is the fastest phone out there right now, has root, and quality built.
i wouldn't touch that motorola with a 10 foot pole. the EVO 3D does everything the Photon does, but faster, with a slicker stock interface