Bignose's 95G reef

[bignose]

I thought about using foam under the tank but I never did. What is the advantages of foam? I'm planning a mixed reef. Most likely will be softies and lps but I hope I can have some sps near the top of the tank. I'm going to transfer my fish from my nano tank but I haven't done much research on fish yet. I want some tangs for sure.
The stand is ok if you look at the top of the pic it looks like the tank is bowing up. Maybe my camera?