For what I do (50 - 150), the Yamaha Stagepas 300 has enought power, bass, sound quality and built-in reverb ($400). They have a 500 watt model now too.

zuki
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Live: Korg PA4X/Bose L1 Pro 8/Senn 935

Studio: Korg PA4X/Kawai MP7SE/Tascam DP24SD/Sony C80/AGK 214/ATEM Mini Pro switcher/