You've all heard this before several million times. Which version is the definite version of Blade Runner to you?

Context:

Google has the digital copy of Blade Runner on sale for $5 (2001: A Space Odyssey's also on sale), so I thought of buying it, but from the reviews I read that the version on sale is the theatrical version, which was said to have been altered by the studio to make the movie less confusing for the general public for the worst with a superfluous voice over and a deliberately happy ending. Then I remembered why I don't actually own any copy of Blade Runner myself; I don't know which version to get. I've watched the Director's Cut myself, but I want to see what everyone thinks.