Quick-Lock makes a number of two-tier stands that are more than adequate, heavy-duty and relatively inexpensive. I use the QL-742, which was recently replaced by the QL-642.

PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)