This looks really awesome! I saw that nobody commented on your post yet. Do you have specific questions? I have very unspecific opinions....
I like what I see so far. I personally don't like stone or ceramic for biological filtration. I find that no matter what people say, the water will not flow through the media, so the only useable surface area is on the outside of it, and not the tiny holes all through the middle. This limits your biological filtration, and the end result is cloudy water and sick fish, even though you are doing everything right. My sump is full (literally full, I don't think I have room for any more in there) of 30 PPI Poret Foam, and it's cheaper cousin, the 30ppi Aquaneat foam. I also have Matala mat in there to hold everything up.
I have never used the Hygger aquarium pump. I have only used Simplicity DC pumps. I find that AC pumps are slightly more noisy than DC. Also, in doing a detailed review (no apologies, detailed reviews are my job), I see that the pump you're asking about is huge. I'm guessing it will run at about half capacity considering head-loss, so you'll be putting about 10x water flow in your tank. What kind of fish are you going to put in there? Many would tell you that this is too much flow for many central and south American cichlids. DC pumps can usually be turned out, but AC really can't. Limiting flow on an AC pump can have a big effect on it's motor life if you turn the flow down with a valve.
On the front of the sump, where the water comes in, it looks like you have "glass" and then foam under it. Are you building a trickle tower here, or is this for socks? If it's for a trickle tower, it looks like the water level in the sump might be too high. The level is set by the last wall after the lava rocks, so you'd have to move this wall down lower than the other two to get some air space in the trickle tower, but this limit the biological media capacity after it, and I wouldn't do it.
Lastly, that tank looks awesome! Did you build it?