Ah! (Deep breath)
Blade Runner, being in my top 10 of all time is a film I could write about for days.
But its late, and I can't be bothered going all Roger Ebert tonight, so let me just say this.
If you consider yourself a real film buff, don't hesitate to get the whole damn box and dice.
Its fascinating to nerdily compare minute details, as I have already done; however, if yr just looking to see what all the fuss has been about for the last 25 yrs, the 'final' cut should answer all questions.
I don't care what Scott and Ford say: I still like the voiceover!

Oh, could I feel as I have felt, or be what I have been,
Or weep as I could once have wept, o'er many a vanished scene;
As springs in deserts found seem sweet, all brackish though they be,
So, midst the withered waste of life, those tears would flow to me.