When I started my new build, which is basically the same size as what you're planning, I had the same question. I consider running a Jebao/Jecod for a bit, but then decided against it since the main return pump isn't something that I want to question in regards to reliability. I then ran the tank on a M1 for a bit until the Neptune pump came out (COR-20). Once it did, I switched over to it and got rid of the M1.
I'm running without a backup pump at the moment, but Neptune has pretty amazing customer service at this point, so I have no doubt that I can find a replacement for it if this one was to ever fail. It also helps if your LFS also keeps a stock of the needed pump on hand in the event of an emergency. Both Neptune Aquatics as well as AC keep a steady stock of Ecotech/Neptune pumps in stock.
In regards to skimmer, I'm still using my Vertex Omega 150, as I did in my previous 47G tank. It performs extremely well, especially since I fed extremely heavy and have the bioload. With 6 fish in the tank and the AFS dispensing food 8x a day, it still needs to be tuned to pull out darker skimmate. One thing to consider is overall filtration that you intend to use. I plan on running my chaeto reactor and if the 150 underperforms slightly, that's not a bad thing since that'll be uptake by the macroalgae or be made available to the bacteria in the marinepure brick. I was pretty aggressive with nutrient export in my previous 47G tank and the chaeto never grew and eventually melted over time.