I am not sure about the Hboot version at all.
I am using EU S4 with 2.15 Hboot
I use MaximusHD - JB 4.2 with Sense 5
When I tried CM it worked fine but the GUI is lame...
Can I combine CM with sense 5 together somehow?
(BTW - recovery should be CWM, the others caused bootloops after flashing ROMs)