Speed Queen vs LG vs ???
My experience
I am not a fan of stackables that are a unit. If ones goes out and is non-repairable, then you must replace both the washer and dryer at the same time. The Speed Queen may be a better unit, but the bearings will eventually go out on that washer. More of you on this forum probably have the equipment, knowledge, and already own the tools to fix this. You may also be able to get parts at a discount. This is not the case for the average consumer. Also, if your circumstances change, you cannot unstack the units later.
The good thing about a unit is they don't have to be unstacked to work on? It would have cost me extra for someone to repair my LG because it had to be unstacked for some repairs.
With that said, the LG washer went out on my stacked unit. I could have bought a new LG fl and still be using them stacked. I am still using the dryer, but I chose to get a topload washer instead.
One thing I do miss is the LG onboard heater. I could wash a load of clothes on Sani cycle (the heated cycle). Garments that smelled like mildew, used for workouts/yardworks, or even pet accidents always came out clean and fresh smelling. Using the same products now even with one of the best performing and cleaning toploads (Maytag mvwp575gw) you can buy today, I can tell you the heated cycle made a difference. I am not sure but new front loads may limit temp of hot water. I see no reason for this given how little they use, but definitely look for ones that don't. Speed Queen does use tap hot.
The LG front load did a good job of getting all of our laundry clean. The only exception was comforters, which could not really turn over.
The stackable would cost me close to $4K with taxes. This is a great deal more than what I can buy an LG stackable unit for. I chose higher end models. The Speed Queen may last longer, but in the end I have not paid more. Sometimes people don't have that much cash up front. It's not as environmentally friendly, but as a consumer there is only so much extra I can pay.
My LG FL lasted for ten years until the bearings went out. It would have required disassembling almost the entire machine. Other than that, I had two issues. One was a rotor that came loose. It was easily replaced by removing the back panel and less than $100. The other was the drain pump (something was left in pockets) that was replaced by me for less than $50. Eugene (Lorain Furniture) has some videos on LG front loads that show it is user friendly to replace common parts. Also, I could adjust the water level on mine by turning a screw. I made sure I could still open the door at any point in the cycle.
Finally, my LG FL had no issue with balancing any load I threw out including rugs, pet beds, etc.