You can use the USA customised.
But you should use NUTs method to keep your root, else you must either unlock your bootloader (what you don't want) or flash back old kernel to root, which may not work properly as 4.2 Kernel could have problems to boot KitKat system.
Gesendet von meinem C6503 mit Tapatalk
Motorola Moto G LTE
Sony Xperia C6503 ZL [bricked], Sony Xperia C5303 SP [sold], Sony Xperia L [sold], Sony Ericsson Xperia X10i [retired]