New Peavey IPR1600 has 1600 watts for $299, and only weighs 6 lbs.
http://www.sweetwater.com/store/detail/IPR1600

I would trust a Peavey more than a Behringer. I used a Peavey CS400 for 16 years, and then sold it for $100.
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Korg PA4x76, Yamaha CP-70 Electric Grand Piano, Zoom L20 mixer/recorder, Turbosound ip500 column speaker system, Zoom B1 FOUR Bass Multi-Effects Processor