If that is the case, no brand has high enough build quality. We have tons (literally) of multi-thousand dollars desks from Steelcase and other high-end brands - all of the two-leggers wobble.
I've worked on a 2.5 meter wide German slip roller which adjusts in a similar manner and sits on two legs. it uses nice heavy bearings and screws. you would break your arm before you detected any kind of wiggle.