Jair- Lak is quite right. The efficiency and the impedance (not just the nominal but also the min/max) of the speaker would be needed to further assist in a recommendation. Also, keep in mind that not all "watts" are created equal. I have 50wpc amps that dance circles around 200wpc units in terms of breathing life into the music. Your amp(s) price range would also be helpful in suggesting a solution. Good luck.