I will say one thing about the newer David Gilmore Blu Ray, yes it might capitalize on the technology in quality over the standard DVD and might be worth the extra 35 bucks to you, HOWEVER the strangest thing is that it does not operate like a blu ray, it operates still with the old menu access etc... Like a standard DVD on this disc for some reason.
I went and replaced a few older DVD concerts with the new Blu ray equivelants and this was one of them, a big reason to me was for the onscreen track access while not stopping the concert and being able to make selections, or Audio adjustments on the fly while the concert is playing.
The Gilmore version is the ONLY one that I have run into that does not use the Blu ray features. Again the sound track and video is somewhat refined of course, however the cool blu ray features of blu ray disc content is not active. I will have to try it on another player to see if its limited to a firmware upgrade, however this was dissapointing considering this blu ray concert is much more expensive than most.