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Here is my deep blue 80g
If I could go back, I wouldn't purchase this tank again. I feel like 16" is too shallow to get the flow how I want it to be, and no matter how I try I can't get my sand to cover the entire bottom so I'm left with a partially barebottom system. Not what I want at all, I'm hoping as my SPS mature I can spread it back out (and possibly add more) where it's created dunes. As you can see my sand is pretty large too, almost like crushed coral, it's the TBS live sand from Florida.
This has been my experience, yours and other's may vary of course.
Nice Reef Savvy, I think mine is around the same dimensions.

I've seen a deep blue 80 that had a good amount of SPS that was really nice in person. I think the trick is keeping the rocks and corals low. With SPS, they tend to grow upward so if the tank is too shallow you can run out of room quick. Some of my stags are approaching 10" tall and look like they want to grow more. If my tank was shorter I wouldn't be able to fully realize the potential of the coral and there is nothing more impressive in an SPS tank that a stag colony or 2. 16" will work, but I would consider that a bare minimum for SPS in terms if height. It would be really hard to make an impressive SPS display out of a 12-14" tall tank, IMHO. 18" would be ideal for a shallow feel but still display worthy, especially if you like upward growing sticks.
You think two MP40qd is to much should I go down to 2 mp10qd?