I have two sets of Logitech Z2200s and one Z5500. They are really hard to beat. I've played parties up to 75 people with the 2200s. Not sure what the current model is. They also have wonderful customer support.
I have two of those wire music stands with the tops converted to be holders for the satellites. I think Gary Diamond made them.
I keep a complete system in a duffel bag on wheels ready for backup use or for when I need a second pa.
DonM