Crown is a good choice.
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I would recommend Mackie amps and Community XLT series of PA cabinents. The models I own and used in our rehersal studio and on the road for over three years with no problems are the M-1400i amps (3 of them), XLT46 (3 way speaker) and the XLT415 (4 - 15 in. subs powered by an older QSC 85 pound monster, the subs stays in the studio when we play out in bars but enjoys the outdoors). Other cabinents in our arsenal are by E/V. Good brands of PA cabinents are E/V, JBL; great ones: EAW and Meyer Sound to name a few.
I have used a number of pro PA amps, and to me, it is hard to beat QSC's PLX line. Their combination of power, clean sound, reliability, and light weight is excellent, especially considering the price point. Crown makes a number of great amps as well. I use a PLX 3002 in my bass rig (3,000 watts into 4 ohm, bridged mono!), and it allows me to have gobs of headroom without breaking my back!