If the quality of the dvds are so good then they would benefit from blu.
All the filmed retro TV shows I have on blu are incomparable with their dvd counterparts. The blu of the original Star Trek or The Prisoner is astounding.
I might have thought that the original Hawaii Five-O would be a shoo in for a blu ray release. CBS have HDed most of the episodes and it would be an excellent tie in with the popular remake, available on blu.
Blu ray opportunities might include:
An opportunity to release "Bored She Hung...