The Elite also comes with an optical audio adapter (if you really need it) other than that, those other things you mentioned are the only differences. The large hard drive does help though, game demos, and if you copy any games to the hard drive (around 7GB) it can fill up.
I heard the coolers actually make it worse, so that will not help. The risk for RROD is tied to the manufacture date and when they changed out components for ones that run better (they do this all the time), for the RROD issue it's with the processors that just run too hot and don't have enough cooling. They just changed the chipset to a newer one that runs better (named Jasper) If they have a manufacture date after 10/14/08 and use a 150w power supply then it's Jasper. You can tell the manufacture date on the sticker with the serial number on the back of the console, The box has a flap that lifts up so you can look at the serial and you can check the manufacture date that way. Mine current one is from February and it's got the chipset right before Jasper so it should be fine (I hope). If you get a new one it should be fine.