I really liked my 29g biocube, I think they are a great entry level tank, AIO having tanken out a lot of the confusing variables for the new hobbiest.
I also agree with the chalk bass, I have one, was my very first fish. I've also kepy long nose hawkfish, Rainfordi gobies, and a watchman.
You didn't mention it, so maybe you don't know, but the PC
lights need to be changed every 8 months to a year. Also you can buy and add LED
bars to the stock slots on the hood. They don't do anything for growth, but do make corals look better.
Also API are not ideal test kits, they will do fine, but research some other brands (Redsea or Salifert) when it comes time to refill.
Here is a pic of my tank before it was looted to stock my 90g.
You can see the chalk bass below the frag rack in the 2nd pic. The pics are about 6 weeks apart, and a year old. I traded the red/green trachy for the smaller green one, and had done some rearranging.
As you can see, stock lights will and do grow corals, if you are aware of their needs. Softies, LPS
and lower light SPS
all did well for me.