The Waterbox is brand new, so there is zero feedback on them. They are priced exactly the same, as an equivalent Red Sea Reefer so cost is not an issue. Red Sea is a VERY well proven company... especially the Reefer series line of tanks. You can click on the Reefer series thread I started, in my signature, and see all of the happy customers. The Waterbox looks promising, but it has a huge hill to climb to compete with Red Sea. Note: The Red Sea 425 would be the equivalent size to the Waterbox 135.4. Ignore the gallon size on the Red Sea... they take into account the displacement of the overflow, the glass thickness and the water line. So the Red Sea gallon rating is always going to be less than other companies, even though the dimensions may be the same. If you are comparing to the Waterbox, only compare actual tank dimensions of each tank. On a side note, Waterbox started a thread comparing their 135.4 and the Red Sea 525... I did not have a very good impression of them as they made a ton of innacurate comparisons about the Red Sea Reefer line. That thread is located here if you want to check it out:
https://www.reef2reef.com/threads/waterbox-platinum-135-4-vs-red-sea-reefer-xl-525.328714/
NOTE: none of the tanks you posted are all-in-one tanks. I noticed that you posted this question in the All-In-One forum, so just wanted to make sure you weren't actually looking for in AIO.