You did the right thing by buying these at Costco. 2 year warranty + additional 2 years if you charged it on the Costco Visa.
The Samsung front loaders, at least the older generation, aren’t as reliable as no-frills top loading washers but you should be fine with the extra warranty protection.
Being space constrained, you really don’t have that many choices if you want full size…
I like the really old whirlpool old mechanical top loading machines, because they clean well and they are bulletproof reliable, and when they break down, they are pretty easy to fix.