I don't own an Aquaero so can't comment on the quality of the display. I am surprised that OP is looking at the OLED displays in his D5N and HFN and wishing that the Aquaero had an OLED display like these. This tells me that the Aquaero display must be TERRIBLE because when I look at the OLED displays in my D5N, HFN and LKS, I wish they would update them to a nice, higher resolution, color display. I actually posted about this about 2 weeks ago in
THIS THREAD with links to a few of the options out there. There are small color OLED, LCD, and TFT displays out there that really POP, cost under $5, and would look great in Aquacomputer devices. There are a bunch of examples
HERE.