I just got my 6.5 inch MB Quart components installed tonight (discuss series) and I must admit i feel disapointed... I mean I know I payed too much for them but still. I must say they do not sound as well as I thought they would. I had infinity reference series coaxals running off an alpine 4ch amp (4x40rms@4ohm) and I would say that had I not wasted $175CDN on the install I would switch back. The infinities were lowder and definatly the better bang for the buck. I payed $160CDN for them last year and payed $400CDN for the MB Quarts about 2 weeks ago.
I really really wished that I listened to the people on these forums and tried out those CDTs from the Zeb.