Question ZL noob needs advice

Hi there people!

My name is Andreas from Germany and I just sold my Xperia S for a ZL. For the last few months I was stuck with combo of Nature Xperia Rom and Doom Kernel cause of incredible battery Life. Now Ive opened up my BL and wondered what ROM/Kernel Combo to choose for ZL since Ive found no real advice in the threads. Even If its worth trying KK Rom instead of 4.3 based?!?!

Any Advices?? Thank You!