Use the same Yamaha mixer that Diki and Don have, plus some 16 and 32 channel Carvins.
The Yamaha is good for mid-size jobs. The bigger stuff is only used for outdoor car shows and really big outdoor festivals-about 6 times a year.
Also use a little 200 watt 8 channel powered Yamaha which works great for most of my live jobs.
Good mixer for the money.
Russ