http://www.reefs.org/library/article/r_toonen9.html
this should tell you what you need to know about sand.
were you using ro water in your prior experience?
to me, using a canister as means of water movement only seems rather wasteful, but that's only because i'd love to have on my planted tank. i'll trade you powerhead for cannister straight up...
what's your budget like? you probably already know about ahsupply.com and their wonderful pc retro kits. you could at least use it as supplemental lighting. 2x13 watt bright kit (no reflectors) is 14.99 plus 6.95 per bulb (actinic 03) at hellolights.com. just something to think about.
best of luck to you.