Phono, if you're going to add these the original release was in 2000, these 2012 is just a new print run (not a reprint, not a rerelease)
You can find the original dates for the eternal edition and the box set here:
http://blog.excite.co.jp/exanime/17370686/
Also, I would hold off adding them until I finish the box set. I was going to add these and some of the earlier releases using the information I'm working on from the box. Its going to take a while, I figure it'll be much easier once the box is done to just add the other CDs once and maybe touch them up. Up to you