[Q] Info for a newbie on S III

Hello guys!,

Few days ago, I get a new S III :laugh:, I come from a HTC device and I dont know how its the scene for the Samsung devices..., I know how to root, how to installed a CWM, etc, but after search and read many posts and threads on the S III forum, I a little confused about what its the best kernel, the best roms (4. or 4.3 o3 kitkat..) and the radios for these mobile. Could you please help me

My device info is:

GT-I9300
Android 4.1.2
Base Band: I9300UBEMH1
Kernel: stock one... 3.0.31-1363899
Compilation number: JZ054K.I9300UBEMH2

Thanks!:good: