OP UPDATED> LIMITED MECHANICAL WONDERFULNESS
Tempted by that mk50 for work, only used brown switches before though what are blacks like for typing on?
They need to be plugged into a USB port to work. Had to plug mine into the monitor to avoid awful static, and hiss.
Not sure what open cup means. The outer dome is grilled if that's what you mean.
Tempted by those qpad keyboards, what type of switch are best for gaming?