Maggie 3,6's with levinson 20.amp any thoughts

I am using a pair of old nakamichi pa 7s, one on each side biamping. Replaced a pair of adcom 555IIs. Naks are sweeter and smoother but lack the low end that adcoms had. Would love to try something newer (maybe built in this century) but alas I am pretty old as well. Best improvement I have made was anti-cables from Paul speltz. They did a great job of smoothing out the ribbons. Integration with midrange is now wonderful.