I find that CM has more features for an AOSP rom. I have run other AOSP roms too. I tried the 4.2.2 GE rom last night......it did not seem ready to me....For me personally CM is better.
It's way better and I'd be on it too if it wasn't for the call issues. Every few calls I get a call where I can't hear the other person and they can't hear me. If I'm initiating the call I can't even hear the phone ringing. Once that's fixed I'll be back on CM.
My point is 4.3 and 4.2.2 are both AOSP so why not use 4.2.2 which is working fine? You said you want 4.3.