I want to go high light with pressurized CO2.
Info on DIY pressure Co2 here
With dirt and sand I feel a little trapped into keeping things the same so as not to release a bunch of filth
I don't have that problem with my dirt substrate, even when I moved the substrate up. I topped with river sand though.
Eheim 2215 with inline heater and atomizer and glass lilly pipes.
Might be cheaper to get a used Eheim 2215 on Ebay. I love the Eheim. It is so quiet. Another cheap alternative is a AquaClear HOB filter.