Oh, oops, looks like I might have misled you somewhat. I was talking about the new episodes when I said to skip 2 to 9. If you're watching the whole 2009 version with both new and old episodes mixed together, episode 8 is new (and probably the most important of the new ones), so don't skip it. Endless Eight happens between episodes 12 and 19. I'd link to the Wikipedia article with the whole chapter order thing, but you know, spoilers.