There are several different kinds of live rock. Figi, Marshall island, tonga shelf and tonga branch, florida and some other kinds i can't think of. It is basically just your opinion on which kind you want. You could just get some uncured from the internet. It would probably be cheaper and would cycle your tank. For the sand i would recomend getting some southdown. It is sold at Home Depot but only east of the missippi. It is basically the same as the expensive lfs kind but is much cheaper. After you got that you could just seed it with a few cup fulls of live sand from someone else's tank.