Hey Jeff - the MA6500 is a super nice integrated. It has lots of detail and out-paces the 6900 hands down. I even listened to a 6500 playing Avantgarde Duo horns and the sound was still excellent - surprisingly so since the other amps on hand were KSL Kondos... And it has incredible power and bass definition considering the modest power rating. Its only downside is a tiny bit of grain the treble. But depending on what speakers you have and what you are used to hearing, that may not be an issue.
Arthur
Arthur