NEW setup

I will be attempting to setup my 75 gallon tank in a couple weeks. I still
am up in the air about SAND or Crushed Coral. I like the look of sand but
have been told that after a year or so you will have a bunch of trouble with
the sand. I guess because of all the stuff dieing in the sand it starts to
create a problem. Crushed Coral on the other hand can be vacuumed out at
every water change. I am going to let the opinions of this post influence
my decision. SO SAND OR CC???? I am going to have a combination of fish
and live rock. I plan on starting up the tank getting some live rock and
then letting the tank run for a couple months before adding any fish.
Another area I could use some help. I have an Amircale wet dry going in to
a reef ready AGA tank. I am not to sure how to hook up all the pvc plumbing
stuff. Does anyone have a diagram I could follow? I assume that one of the
pipes goes to the top of the W/D were the bio balls are and the other goes
back to the tank from the submersible pump. If anyone has any advice they
could give me PLEASE DO. I have been reading a fair share of books but
still have a lot of questions. I also will need to find a Local fish store.
I will be moving in a couple weeks and have no idea what is around me. I
will be in the Swedesboro area if anyone can help with a store near me I
would GREATLY appreciate it. THANKS for any help BILL