I personally like the crushed coral... it keeps my ph right where i want it.. 8.1.. but i guess its personal preference... i used 20lbs of crushed coral/live sand and the rest was pool filter sand.. it works great for my case..
Anyways.. if you dont have live rock your tank will take 10x longer to cycle.. its kinda steep.. but if you need it NOW go to your lfs
and get about 20lbs of live rock.. the other rock in the tank now will be colonized soon enough..
live rock isnt cheap... and i dont know thoe going price in florida... down here in texas its about 9 dollars a lb though.
it will help with your situation..
Also what lighting are you using?