My favorite (I own one of these) is the german system L.U.C.A.S from Hughes & Kettner. The system is composed by one Subwoofer (300 W) + two tops (150 W each), a total of 600 Watt. If more power is needed, the L.U.C.A.S 1000 is a good alternative. It has lots of power, yet clear, rich, well balanced sound.

You can find further details in: http://www.hkaudio.com/as/lucas/index.htm and http://www.hkaudio.com/as/lucas_1000/index.htm

Best regards,

José P. Matias.