PP-HK Ching, I'm using 806S too with Nait XS and CD5XS! I found this is quite matched and be honest, I am addicted to JMLab's mid and high pitch sound, which other brand of speakers can't deliver (they may have their own strength). But your report on Triangle Quartet can give me some insight when I plan the speakers upgrade... pls output more report once they are run in. Enjoy!