[Q] Best ROM for Galaxy S3 SGH-i747

I, like many other Android users love how much rooting your phone opens up the customization by flashing ROMs and such.

I have a Samsung Galaxy s3 SGH-i747 with Bell but it is the same as the American AT&T SGH-i747.

So what I am wondering is if anyone knows the best ROMs that features these:

-Great battery life!! ***** this is a big one!!!
-Running Jellybean 4.1 or 4.2
-Running the AOKP/CM theme engine*

I am running JELLYBEAN 747 ver1 and the battery life is alright, I can't have my brightness above 10% and data/wifi on without it dropping 10 percent every half an hour. while playing some games, the percentage drops about a percent a minute. It is a fairly good ROM otherwise but I would really like the theme engine that I used to be running on my original Galaxy S i9000.

Thanks in advance!!!!