180 all the way brotha... like i said earlier i ahve 60's+the 180, the 180 has NO problem keeping up with the 60, heck it's a large speaker.. The 150 could Never keep up with the 60's... I had the 150 for about 5 years, i knew i wanted something bigger. When i read about the 180, there was absolutely no hesitation i knew that i wanted one.