I was originally in the HD DVD camp, but once the format war ended with Blu Ray the heir apparent, bought a dual format (HD DVD and Blu Ray) unit, so I could continue using my existing HD DVD titles, while enjoying the new releases Blu had to offer.
I have since replaced my HD DVD titles with their Blu counterparts, with a few exceptions, and gone strictly Blu with an Oppo BDP-83.
Superb playback of all high def audio codecs (Dolby Tru HD and DTS Master HD) as well as top rated DVD upconversion.
Kind of a moot point as to which is better, unless you buy a dual format player, of which there a only really two, and neither of which being properly supported by the manufacturer, IMHO.
That was really the biggest reason I bails out on dula format and went with Oppo, superb customer service!
Best,