90gal setup

[salmon46]

After reading threads, articles, books, etc, I am ready to convert my tank for FOWLR. Here is what I have today

90gal tank
2128 Eheim filter
Eheim Pro III filter
25W UV hookup to my 2128
Stealth Heater 250W

So far, I have decided to go sumpless and go with Tunze 9010, and for lighting, I recently purchased Coralife Aqualight Pro Metal Halide 150W(2). I plan to keep dwarf angels, shrimp, snails, tangs - welcome other fish recommendations.

Still have the following decisions to make

1. Should I go BB or go with 1 inch of substrate? The LFS guy suggested I go with live sand & sugar aragonite.
2. Should I reuse my 2128 eheim w/ UV for carbon filtration only w/o filter media?
3. Should I reuse my Eheim Pro III for water circulation? Or should I purchase those Hydor Koralia, Tunze or breakout the piggy bank & go for those Vortech water pumps?
4. Where is good place to purchase LR in Vancouver? Prices and quality seems to vary from stores I visited so far.
5. Do I need to get another heater as backup? Tank will reside in the main living room where it averages about 23C.

the joys of setting up a tank