Hi there! I currently have the same tank as well.
1. Return Pump - I went with a Neptune Cor-15, which I have been very happy with.
2. Skimmer - I went with a Reef Octopus 110sss, great skimmer, very stable and never overflows, but it is a little undersized though, I'd go with the 150 if I were to do it again.
3. Heaters - I run a couple titanium 200 watters (one as backup) from BRS, on an inkbird controller, but plugged into the apex as a fail safe.
4. ATO - I went with the tunze osmolator 3155 and then I purchased an additional 15 gallon reservoir (innovative marine)...I can go about 12-13 days before needing to refill.
5. Lights - I'm kind of old school, running metal halides.
6. Wave Makers - I started with 2 ecotech MP40s, but as corals have grown in and there are a few dead spots I added a couple MP10s, but I don't recommend as the glass is too thick for them to hold well. Probably would have gotten a couple directional tunze pumps instead to fill in dead spots with the MP40s. Some of the gyre pumps would also be great, I just don't like having the clean them so much to keep them going.
Good luck with your build!