I have an original release 360 that has, thankfully, never RROD'd (knock on wood) with a 120gb HDD I added later (originally 20gb). But I'm debating upgrading to a new 250gb 360 S with Kinect for the kids, primarily for the HDMI, built-in wi-fi, and I hear they are quieter (my current unit sounds like a jet engine).
1.) Is it just a matter of de-registering my old 360 and then recovering my gamer tag on the new unit?
2.) Will I be able to download all my XBL games again? (I have about a dozen.)
3.) Hexic HD came with my original unit, but I heard it's no longer available on XBLA. Will I still be able to re-download that to the new unit?
4.) Anything else I should know (pitfalls, problems, opportunities) before getting the new unit?