When I downsized my 90G I did some research into the Red Sea Max and the JBJ Nano 28G
HQI. The JBJ was a good option for me because it had halides and I had several SPS corals. Hindsight I would have probably gone with a 38G standard size tank and purchased the lights, hang-on type
refugium, or drill the 38G and setup a standard
sump type Fug.
I guess it comes down to opinion and in the long run and there are several of those out there along with different options when setting up a Nanos. My advice would be to do lots of research and explore every otion.