Kyle,
Thats a great intro and write up.I look forward to watching you grow your hobby.
One suggestion. Becareful on your heaters.. a single 300 watt heater on the 45 gal tank and the 36 gal can be a problem. If they malfunction you can quickly cook your discus . Often 2 smaller heaters are safer...at the very least consider a temp alarm. Many hobbyists have had their heaters stick on and cook their fish. With two smaller ones the risk is minimized.
Al