Have fun with a weeks worth of washing sand!!!!!
I use the cheap sand from Home Depot, and am very pleased with the results. Never had a problem with it damaging the filters, and my tank is not drilled. The only problem with sand is that you always see fish poo floating on top of it, and if you are not carefule you can scratch the glass with your cleaning magnets.
Washing the sand was easy. First I dumped 2 entire 50 lb bags into the empty tank. Afterwards, I used 2 hoses to clean it. One hose was attached to a power nozzle that was turned on full blast, which I forced into the sand in circular motions repeatedly to make all of the sediment and impurities float. I used another hose that was attached to a cheap utility pump to remove the dirt and sediments etc. After about 15 minutes the sand was clean and the water was clear. Hope this helps...