I want to root my phone but I don't want to void the warranty on the phone in case something happened to it.
I expect more senior members of the forum will chime in but, in my opinion, I think every variation of root will void the phone's warranty. Once a viable KitKat root is available, there may also be a way to reverse the root and get the device back to what would appear to be a "stock" state. I placed stock in quotes because every root option I have ever used placed a custom flag on the device in one way or another. If the sales person does not know what to look for, you may get lucky.
Everything comes back to the fact that every variation of root will void your device's warranty. The choice to root is solely on each person. Hope that makes sense. I am sure more comments will go through shortly.