What Custom Recovery to use w/ Lollipop 5.0.1 Rooted

I rooted my S4 ATT SGH-I337 yesterday with Kingroot while already having Lollipop 5.0.1. I then downloaded Flashify & Flashed ClockworkMod Recovery. Restarted my phone to goto recovery and I got a yellow triangle saying this phone has software unauthorized by att.

What Custom Recovery can I use and where can I find the latest version? Will TWRP work and also I've heard of something called Philz?

Oh and does bootloader have anything to do with this because when I rooted my S3 I never even knew or heard of bootloader.

Thanks in Advance