See, I am the direct opposite of you. I am 43 and have been to alot of concerts in my life. I think I have trouble hearing the high's sometimes. I turn my Onkyo up to +12. I have the 60's also. I absolutely have a different experience than you. I love the tweeter highs and hear no siblence in these speakers. Turning them back makes my music flat and I listen to alot of different types of music. How is your NAD working with the 60's?? I am interested in either the model you purchased or the 752's. Can you give me any info? By the way, can you really hear 5-7 hz of bass extension? The most I ever turn up my bass settings are +6 and that is on the absolute best recordings.
Thanks....