[Q] My Asus TF300T is on stock Android 4.0.3, what to do next?

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http://forum.xda-developers.com – The darn thing just started nagging me with an update notice that comes back every ten minutes. I read somewhere that updating is going to stop me from doing certain advanced things, so I finally got the last push to go for either CM10 or CleanRom, depending on which one gives me the most advanced and pleasant experience. But before doing so, it's recommended to get some kind of flash info file or something from it that doesn't come out when upgraded to the latest firmware but does on the old 4.0.3. What would be the best way to go from now on? Sent from my ASUS Transformer Pad TF300T using (HowTos)