I can vouch for CM; It's become easier to get it onto your phone nowadays... just download the installer app on phone/PC and it'll download and handle the flashing for you.
If you're a power user/feeling a little adventurous, you can manually download the file and flash yourself using recovery.
Not much to say lah about CM.. almost stock looking but with added tweaks and little things that make usability very nice.
Features wise, they have Pie Controls as well, built in App Ops, Privacy Guard, WhisperPush, etc etc...
You want more? get Xposed, Gravitybox, etc etc... haha.
EDIT: Oops, most importantly, CM11 is based on KitKat AOSP which right now is on their 3rd month (M3) snapshot build.
Ya, I saw PA and Slim seem to be on weekly and Omni is on nightly. Probably will get the CM Monthly. Now I just need to find the time to sit down and do it.