Which "Kind of Blue". I'm so confused

The oldest release and/or the cheapest.

I am probably in the minority here by saying that I think remastered is an excuse to get you to spend money unnecessarily. Buy the new and improved version, bla bla bla...

While I cannot speak for that particular recording; some remasters make them sound better in the car and/or on portable equipment. On good equipment they sound worse. Again, I may be in the minority opinion, but it is what I hear.

There are some genuinely great audiophile remasters that are better, but unless you are really hardcore, they may not be worth the premium price.

That was kind of my point. I was aware of the speed issue, but it never meant much to me.

No one a the time (musician's & engineers) picked up on the error by ear when they heard it. These kind of people have fantastic hearing. So how much different is it?

A reissue might sell a few hundred thousand copies. If they tell everyone they fixed a mistake, they can sell millions of new copies. Am I giving away a trade secret?

So will your wife care if you only spend $5 for a used CD made before 1997 instead of $30 for the latest thing?