I have a 60 cube from Coast 2 Coast. The build quality is solid, but it is lacking on the details. I only bought it because I found it on CL used. AT&T had it built for a two day trade show to demonstrate water-proof phones. They literally used it for a weekend! I was able to get it for 1/3 of what it would have cost shipped to my house new.
A new tank from Reef Savvy would have cost roughly 10% more than C2C, but the tanks are 10x better.