Amnesia Story

[Krimbo]

Ok.

I haven't played Amnesia yet.
I'm going to do a blind playthrough of it once I've finished one or two of my current Let's Plays. I don't want to play it before then.

But I really want to play Amnesia.
I was wondering if there is any good, long DLC's/Addons that don't relate to the actual Amnesia story or spoil it.
Is there any?

I'm thinking La Caza. Will that spoil Amnesia's story for me when I come to play it or not? And how long has it reportedly taken to play?

If you've got any suggestions please let me know.
Cheers guys.