B&W 801 Matrix or JBL L150

I know Matrix is a much more expencive, Hi-End kind of speaker but still I'm allready used to kick ass huge sound of JBL driven by Mac 6900. I'm thinking about getting myself a McIntosh MC2500 amp and possibly a replacing JBL with 801 Matrix. How do they compare? I'm sure B&W will be cleaner but I'm afraid of it's brightness (not that the highs on JBL are anything special, but they are pretty comfortable with the right system). Will it give the same HUGE sound and bass? Looks like it should but still...