Be warned... if microsoft services your system there is a good chance you will lose all data on the drive and any live marketplace games you purchased will no longer be tied to your system making it so that only you will have access to the full games. This is only a concern if you have friends who also play on your 360 and have their own gamer tags.
The 360's have a TERRIBLE thermal design.
Adding ~ finger width to the height would more than solve the problem.
The heatsinks are WAY too small and the fan and ducting give priority cooling to the cpu.
I got one of those 'intercoolers' off eGay. Is loud as ****, but after modding my console, i cant afford it dying from heat.
Its usually the gpu that dies btw.