Sump help - what pump to buy? Jebao? Waveline?

Everything has been going ok for the past few years with my 150, but things are getting worse for me. I was considering getting rid of the tank - again - because my back is hurting when I work on it. My wife wants to keep it, even if that means some changes, so I'm thinking of switching to a sump for easier filter cleanings. So I'm thinking it'll be easier if I get a sump for it. I have everything planned out except the pump.

I want a submersible, low energy pump and my plan was to buy one around 1500gph, or higher. From the research I've done, I like the Waveline DC12000, Waveline DC10000II, and the Jebao DC-12000.

All are basically the same type of design, and I've read a ton of threads on them - but nothing really long term. Does anyone have recommendations with these or others? I've been happy with my Rena and 400's for years, I'd like something to last.

Head height is about 5-6 feet if I estimated right. These guys can be messy and I don't like to underestimate them, I'd rather have to turn it down a bit. The 9000 may work though... these guys can challenge a filter.

I plan to keep the Emperor 400 and canisters as backups as well.

Well, I found a DC-12000 for such a good price that I bought it today and it should be here in about a week. I thought I had everything for the sump planned out, but I can't get the 40 breeder sump to fit underneath unless I rebuild the stand. I'm still debating that option at the moment, but some tubs may be the only way to go.

I'm hoping I get the newer model now that I know it exists. I almost bought from fish street but I found a little better deal - we'll see how that deal turns out soon, I think it will be delivered later today.

I ran into a few other sump problems though. I had planned to slide in a 40 breeder tank but after I poked around under the stand more, I found I only had 15 inches of width due to the previous owners construction methods. I went out and priced out a plastic tub that will slide right in, but I'm having some doubts about this idea already. I was thinking of dropping a stack of drawers in on the left side, each layer with different media and holes drilled in the bottom to drain the water from one layer to the next. Once it drains out the bottom I would use the middle section for some K1, a powerhead to circulate it, and my ceramic blocks for the algae filter. Then I'd have a plastic cage on the right side for the pump to sit in so the K1 doesn't get sucked up.

Like I said, I have OCD, so I'm having some issues with the less organized plastic bin idea right now. The alternative I have is a bit brutal for the timeline. I have the option to use my 32 gallon brute and move the fish into that temporarily for a day and tear down the entire tank and rebuild a few things on the stand so I can slide the 40 breeder into it.

Right now the stand is almost overbuilt even by my standards. The previous owner used 14 2x6 boards for the vertical support alone, and the side pieces are all facing into the stand on the 6 inch side. He built the stand a bit wider than the tank, that's why it leaves me 15 inches inside instead of 13. Once we move the tank off the stand, I have access to the screws for the boards and I could rotate either rotate them or replace them with 2x4 boards on just one side and I would have the space I need.

So do I have to worry about replacing 3 boards with 2x4's? Two would be the middle front boards on the length and one would be a side corner board. I'll see if I can get a photo to help clear it up. The main corners would still have a 2x6 on each corner, but right now the corners actually have two 2x6 boards as a L shape.