Base rock is usually dry rock, that will become live. The circular sponge is the round black thing you have, in your pics.
I agree, ditch the CC, it is a pain to clean, I had it and didn't like it. There are some folks that love it...not me.
I have these Lights
and love them. What is the length of your tank?
You can get the aragonite sand at the same site. I would go for medium grain size, the smaller tends to blow all over the place and the larger can inhibit your sand stirrers/sifters.
Just an FYI, the bold words will take you to the links of the products tec and I are talking about.....I just learned how to do it, thanks to tec!!!