Update:  With more sure to come.  Picked our HR1's up from Bob yesterday.  First of all, I just had surgery a few days before.  Bob was super gracious and helped my wife load them.  We got them home and hooked up.  Right off the bat, I think I'm hearing some great things. Actually.... Some I'm sure I'm hearing.  Bottom line, this upgrade is not miniscule.  It is definitely audible.   Even my wife who never makes comments took notice.  I like to journal and take notes; so Ill be back with a real update in a few weeks or so.  For now, I just want to soak it in. But, if you're on the fence about these, I'd jump off on the HR1 side.  Otherwise, you'll end up with a speaker splinter.  Joyful Listening!  J