Tony, as for heaters I've had many different brands, and not a one can I say was with out worries.
The first to go bad on me was a Visitherm glass: That one got stuck on On, and boiled my fish.;( The last two that went bad were the Titanium ones; those two burst. One in my fowlr/anemone tank killing everything, and darn near electrocuting me as well. The other killed almost all my fish, and just about every sps in my reef. I now have the Ebo Jagers, and if it wasn't for the therm controllers you cannot trust their internal temp control either. What ever heater you go with PLEASE use them with a controller buddy, and still check them periodically.
I don't know much about leds or T5, I will be switching to Wingo's leds in the near future. You might want to check with him before you make your purchase.
ATO I did have a diy one that I hated, now I have a Reef Fanatic which I like a lot.
Sand, I loved my "Old SouthDown", but that is no longer available.
I am currently leaning towards the "QUIKRETE Play Sand" sold at Lowes.