For SPS you need 4 things essential!!!
- Light (need to provide minimal 200PAR but all depends of what type of SPS you want)
- Tons of Flow, not directy but good random flow
- Good Export system (there are many...DSB, probiotic, Algae Scrubber...etc ...a good skimmer too! but it all depends of the Import)
- Chemical stability
The material to buy? well..after you choose your tank dimensions you just need to think, what material do you need to have all the parameters i wrote above!
If you provide these, 90% you will have sucess...the other 10% can be a torment to you and I´m talking about reef pests, non reefsafe species, your hands in the tank!!! etc