Rack Mount Power Supplies?

[fighterpilot562]

https://www.youtube.com/watch?v=cjxgoJ86tFY

So I wanna do something similar with my retro gaming setup. But the one he uses/suggested has questionable reviews, some are saying they are cheaply made

http://www.amazon.com/Technical-Pro-PS9U-Supply-Charging/dp/B0057RL6DQ/ref=sr_1_fkmr0_2?s=musical-instruments&ie=UTF8&qid=1461008053&sr=1-2-fkmr0&keywords=ps-s9+rack+mount

And I need 2 of them. Also my brother wants one for his salt water tank. Anyone suggest me a good brand for my retro gaming set up?