I get all my imports from CDJapan.
And freako, whoever you are, pipe down about raw quality. I KNOW what raw quality is like. I'm an encoder for digisub groups, so I know my shit here.
Online raws are fine for watching and possibly reencoding for fansub distro, but they're just not acceptable for making an AMV out of unless you know your filtering. I'm doing Galaxy Angel 3 for ANBU and I have to put the raws (which are over 300MB each, BTW) through at least 4 filters before they look acceptable quality (i.e. so they look like they COULD be from DVD, to the untrained eye).
The fact is that no, they are not "DVD quality" since that's complete bullshit. First off, they are never encoded in 720x480 MPEG2, so by that virtue alone they aren't comparable. Most are some MPEG4 variant (MP42, DIV3, DX50, XVID) and they're encoded in 640x480@23.976 fps. The worst is when the show has a 30fps intro (like X or Azudai) which is then decimated in framerate to match the rest of the show.
Then you have the whole editing with keyframing issue. Unless you serve the AVI file through AVISynth (which will make things very slow) you will be stuck with enormously long seek times because unlike DVD-spec MPEG2 you can have as much time inbetween keyframes as you want in an MPEG4 stream, so sometimes you may have to decode 300 frames just to get to the frame you seeked to, and even on fast systems that will take a long ass time with a 640x480 file.
Anyways, YES I know what I'm talking about, and I'll say that 98% of the people on this site are not ready to use downloaded footage to make it look like they didn't. I can tell.
As for cataclysm:
http://www.cdjapan.co.jp/anime/topics/g ... index.html
There's CDJapan's page on GITS:SAC
The first DVD came out on the 21st - unfortunately like most Victor releases they're doing 13 volumes of 2 episodes each.

Which is pretty damn pricey at 6000yen/volume (~$50).
But I would definately recommend not using the GITS online raws because their quality is nasty, I've seen them.