Anyone heard Dead Hi-Rez downloads from HDtracks?

Before I purchase another copy of some of my favorite Grateful Dead albums, I was wondering if any of you had the chance to listen to the "Complete Studio Albums Collection" hi-resolution downloads available on HDtracks.com. If so, which version the 192kHz or 96khz? I already own the remastered CDs, so the real question is: are these worth $250?