you will need to post the results, I am setting up a 20G long qt for coral so I am interested as well, but I will let you know what I go with as well if I beat you to the punch. I bought 2 or 1 Sicce nano stream pumps 530 GPH depending on flow.I haven't done anything yet! Not sure what I want to do still.
Eyeing the XP Aqua for an ATO not needed but once you go ATO its
Eyeing the above mentioned marineland 350 for filter, will use media or bio-balls from main tank
heater is just a 75w eheim jager
no clue on light though