I'm using CC. I like the way it looks. Actually, you won't be looking at the substrate anyway. Once you get all the live rock, fish and corals who looks at the substrate. I'd even be willing to bet that no one comes to your house and says "wow, great substrate":lol2:
Seriously though, I went back and forth over it. I lot of people on another forum just about jumped me for asking the same question and acted as if sand didn't have any problems in and of itself. There truly is not right answer as I'm sure you will find out listening to everyone one. This is probably the most opinionated subject in this hobby I've come across yet. When all the dust settles (from the sand) just remember my joke up above and enjoy which ever you chose.