I install a few winches a year. I have installed countless Smittybuilts and other than the engage handle could be a little tougher, they are a great winch.
I would not buy a HF winch. Have always been crap. Now they have a new different looking one that is more expensive. The higher price suggests it may be better but Im not a gambler.
I would not buy a MM. They are slow as hell and sound like they are full of gravel. Basically the same as the import but with a higher price. Look to be made out of the same parts as the imports.
I would not buy a Superwinch unless you were in the market for a hydro winch unit. Im not impressed by the price or performance of their electric units tho.
I would buy a new Warn laydown I series. Or a used 8274 upright if you have tons of space and some overload springs.
My poor smitty has pulled tons of rigs. Last week I used it and two snatch blocks to unload a 4K knuckle boom off a flatbed. 4K hanging is a little different.