I've been using CaribSea Special Grade Reef Sand for several years on my high flow tanks, PetsMart usually has the best price for it:
http://www.petsmart.com/fish/suppli...ch&searchterm=caribsea special grade&ps=false
really like my tropic eden reef flakes and mini reef flakes mix doesn't move around easily but the fish still shape it, and when it does get moved around it settles quickly with little dust.
caribsea special grade reef sand :thumbsup: Still good even if you have sand sifters but nice mix so it doesn't blow around.
Petco also has caribsea special grade on its site (but it only says caribsea aragonite, doesn't say the grain size). I got it during their 30% off sale and it was about $0.60 per pound.