Most of the releases have the bit of dialog in it with the most but it is not distracting. The "Tears in the Rain" dialog is important IMHO so I like it in this case.
The version you should seek out is the Audio Fidelity CD/SACD or the Audio Fidelity "red" vinyl version. Both mastered by Kevin Gray.
These are the standard for the Blade Runner and allows Vangelis's music to sound the best it can. I really like my copies and I have both of them.