Oops... Didn't realize I'd posted it in the GPE section. I'm leaning toward the Sense version, if only b/c the GPE one is $50 more. (I wish HTC had done the radios like the Nexus 5 where the unlocked one works on Sprint too... that looks to be water under the bridge now, though.)
And asking Sprint to unlock it wouldn't help if I have no connection to Sprint. I'm not on Sprint now, and not getting service on Sprint (what I'm considering is an MVNO that uses Sprint's network). Some MVNOs will support phones on the carrier whose network they use. Some appear to be less allowing, only supporting phones with their own branding/configuration and maybe a few exceptions.