Knock wood, but I have an Amanatag SAV4655 that has been doing an average of 10 loads a week for better than 7 years.
But if you compare the so-called "infamous" Amana NAV and Maytag SAV models against the current Speed Queens, there's really not that much difference.
Different outer tub (assuming one believes that a porcelain-coated steel outer tub is vastly superior to plastic - millions of Whirlpool machines would tend to prove that untrue), maybe a different inner tub (the TOL Amanatag had a stainless steel tub, mine is plastic), a different agitator, a different pump mounting scheme (clips vs. Torx screws) and a different tub seal. But Amanatag improved the tub seal toward the end of the production run, so there's not really that much obvious difference.
While I think the current Speed Queens are very good machines*, they lack features compared to my Amanatag, like automatic temperature control for the cold and warm settings (yet hot is tap-hot on the Amanatag), and a 3-speed motor.
*When my Amanatag finally develops the groan of death and spits grease around the inside of the cabinet, I'll replace it with a Speed Queen.
My 2 pesos.