Sign [Q] New User! Please tell me if I got this right about 4.3!!!

Hi, I just got my Galaxy s3 today from virgin mobile (SPH-L710) already updated to 4.3. I really want to flash custom ROMs, and I was reading the forums about the rooting and custom recoveries, and please correct me if I am wrong in any of the steps so i don't mess up my lovely new S3!

--K1mu found a method for safe rooting, meaning the Knox will not be flagged, and once we get root we can disable knox services (no warranty voided)

--Bootloader is already unlocked for the sprint model (SPH-L710), and is locked for other carriers such as AT&T and Verizon (for which they use safestrap)

--Since bootloader is unlocked for this model, I can install custom recoveries and custom roms as long as i dont install versions below 4.3.
for example i can install roms such as:
[ROM][4.3][TW] BareBones v2.3(3-28-14)
[ROM][MK3] PROJECT X v4.3 [Team Rejectz][3/24/14]
[ROM][UNOFFICIAL][AOSP][KK][27/03] **C-RoM** -4.4.2- -v5.6!

But NOT ROMs such as:
[ROM][4.2.2] MIUI V5 4.2.14 d2spr
[ROM][4.2.2] [UNOFFICIAL] Dirty Unicorns v3.6 [7/30] (HALO!)
since they are below 4.3

--My warranty is still not voided due to the disabling of knox right after rooting.


Thank you very much