Any of the aftermarket ROMs such as CyanogenMod 11 (CM 11), Paranoid Android, AOKP, and many more are KitKat based and stable enough to use as daily drivers. And, they all should be pre-rooted.
I personally prefer PhilZ recovery for flashing ROMs.
Also, if you're using a SPH-L710, you should flash "D2LTE" builds of whatever ROM you're considering, and you can flash the Paranoid Android GAPPs package on top of it.
Sent from my SPH-L710 using Tapatalk
Your "THANKS" are not necessary, but I would appreciate them when due.