You want to make sure that the locking knob which connects the vertical to the "horizontal" arm is capable of exerting enough pressure to prevent premature drooping. Nothing is guaranteed to make an audience laugh more than the sight of a microphone slowly sliding down, and the perfornmer stooping lower and lower.

The clip holding the microphone can have the same problem, but can easily be adjusted for stiffness.

Other than that, the fitments are pretty standard, and it is really a choice between black or chrome....

Murray