If you "need" to wipe the box to a fresh state from recovery, make sure you do not reboot until you install the rom/recovery zip or your be left with a bricked device with no system loaded on to it. Also check you have blocked updates once wiping via recovery or amazon settings format because they will be reset back to the basic original settings again or it may update to an unrootable state in the future?
As rbox said version r4 is the latest with all the fixes for me version r1 or r2 with 3.0.3 recovery installed (cant remember which im on?) works great for me so at the moment I have no need to update yet. Do some reading & see which one you want to install? Think r3 or r4 can't access recovery unless you do it via a adb command? On my version you can just select it using a keyboard & swiping right.
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As rbox said version r4 is the latest with all the fixes for me version r1 or r2 with 3.0.3 recovery installed (cant remember which im on?) works great for me so at the moment I have no need to update yet. Do some reading & see which one you want to install? Think r3 or r4 can't access recovery unless you do it via a adb command? On my version you can just select it using a keyboard & swiping right.
Sent from my SM-G900F using Tapatalk