help with flashing twrp and a stable rom?

[Kannz2]

Hi awesome peoples! anyone happen to know a healthy rom without any aggravating bugs and a link with the best way to install a recovery? My phone is a sprint SPH-L520 its on 4.2.2 right now not rooted yet. It's asking me to update though on firmware na7.

 

[Kannz2]

Um once I root with odin can I use flashify to flash the recovery from the 12.1 thread? I don't know how to convert a .img to a tar to get it working in odin. I don't want to experiment with my phone please someone stop me if this will mess it up.