I also have a Behringer PMH series 8 channel 400watt (800 watts bridged) powered mixer and have been using it since Dec of 2004 and working fine. Plus it is SUPER light, small and easy to use, I love it. And it was HALF the cost of the Mackie 880.
Don't know why I keep hearing about Behringers breaking down because I have had a Behringer mixer for years that worked fine and thats why I went with the powered mixer.
I got two JBL 15's for mains and two 12 JBL monitors and this baby cranks...enough for me anyways!