So I've been trying out a few ROMS on my Galaxy Nexus every now and then (AOKP is one of the best), and I couldn't say why but I had skipped Cyanogenmod all this time.
Well finally I got to flash it last Saturday, and I must admit that you have to believe the hype when you read that is one of the best all around ROMS I have ever tried, it feels fast, responsive, fluid, and it has many neat features:
http://www.cyanogenmod.org/
I though by the time I installed all my previous apps it would be as good as my previous ROM, but surprisingly it still feels much more light on its feet, so don't hesitate giving it a try.