Share your experience!
You will be fine as long as you don't unlock the bootloader
after root if u unlock ur bootloader u can flash kitkat so y worry about recieving updates
n yeas it will void ur warranty
Unlocking the bootloader will delete your DRM keys for good, you can not restore them, even if you relock the bootloader, and kitkat its only a custom ROM not an official ROM, with that said, flashing a custom ROM has the advantage that you will have the latest Android version, but there are trade offs such as the camera quality isn't as great,etc etc