I have the JECOD DCT3000 on my 48g with 15g sump, and its turned one up from lowest setting and still pushing strong at ~240gph measured (by me, not an estimate) through the sump which is right where I need it.
They are adjustable from 237gph to 792gph not accounting for head pressure. So I cannot imagine a scenario where it would ever be too weak nor too strong for any tank 29g-75g.
It was only $55 plus shipping (I think $67 total) and is dead silent, strong, fully controllable, same deal as every other DC pump. I'm 100% satisfied with it and my setup is mirror of yours (it's my old tank! lol).
If you want I would be more than happy to post videos and a photo of the back of the box with the head pressure graph.
Is it cheaper parts than RO & Waveline? Yes. Does it work just as good? Yes.
If it ever breaks, I can replace it twice before it hits the price tag of the other brands anyways, and by then maybe i'd have more money for the Waveline model like in my RLSS skimmer.
You are thinking of the OLD model Jebao DC3000, you want the JECOD DCT. It goes lower to 237GPH which I think is roughly 190-200gph at 6' head (again I am thinking without checking).