Quiklok WS550. Compact, adjusts to lots of different heights, super-stable, and you don’t get bruises on the shin of your pedal foot (or lose your pedal to low coefficients of friction onstage, and fail to nudge it back because your knee gets stuck under the X…I’ve had some interesting multitasking moments on stage with X stands).
http://www.quiklok.com/catalog/?p=productsMore&iProduct=27&sName=WS-550