1: That's the one
2: I bought one off of Amazon and it came very well packaged. The hard drive had it's little plastic clam shell thing while being pinned by two black plastic mold things in mid air where it couldn't move at all. It was also double boxed. I was very please with the packing.
Since I have never done this before, I don't know what accessories I need. I assume I need some thermal paste and some cables. What else do I need?