Ugh, getting the upgrade bug, I’ve gone from the the Sierra-1 NrTs to the Sierra 2s. Added a RAAL Horizon, then added the Luna’s to my office setup. Now I’m thinking about replacing the Sierra 2s in my bedroom/2 channel listening room with the RAAL towers for the better midrange. Anyone want to speak to the incremental improvements of the RAAL towers over the Sierra 2s? Have a rythmik f12 to fill up the low end... or should I go with a second f12?