Live rock question

[bdhb12]

This seems like the place to ask...
I found some live rock and there are all kinds, Figi, Africa, Caribbean, Florida, etc
What live rock is the best? Also they say they have hitchhikers often so would choosing one from a certain place give me certain chances of certain hitchhikers?

 

[nissan577]

i always get fiji and caribbean. and they have exticing things

 

[bdhb12]

What about live sand? Does the stuff in the bag with just bacteria better or worse then the harvested stuff the insist on shipping overnight? (for $191 I might add nearly three time the cost of the sand {I said no in case your wondering})