Last will be the sand bed, it still quite empty, only one Zoas frag.
Looking to add a few more frag, purple death paly, nuclear green paly, sunflower zoas and drangon eyes zoas and Rics
For lighting go for AI prime, Hydra 26HD or Kessil A160w or A360w both fully controllable, if have the budget.
When u upgrade u can still use back.
I'm using one RW 4 in my 2ft and it like typhoon. Have to set to lowest to prevent sand storm.