I always used to favour the stock version of Android HOWEVER having both an HTC One and a Nexus 7, I have to say that the skinned HTC One experience is far preferable.
I know that some manufacturers add pointless additional functionality and bloatware but in my experience all HTC have done is...
Sounds like a stonking device and I hope the supply issues that blighted the Nexus 4 have been sorted this time round.
Google and LG took so long to pull their collective finger out last time that I ended up waiting for the HTC One instead of getting a Nexus 4.