Investigate PSB synchrony’s. Sensitivity is a cinch for the 375BEE as well as there 4 ohms impedance, to add to that power handling is about as ideal. Safe bet they would be a very nice step to you and work excellent. PSB and NAD also happen to have great synergy together if lots of detail and loads of musicality is your thing. I take reviews with a grain of salt, there is no short of positive buzz out there. I have also heard the combination along with plenty of other PSB/NAD partnerships that I will vouch for in confidence. Mids and highs noted, those are just a couple of there strong points.
http://www.psbspeakers.com/articles/TAS-Synchrony-Review
http://www.psbspeakers.com/products/synchrony/Synchrony-Two#heading-downloads
http://www.psbspeakers.com/content/110620153653-PSB_Synchrony_Series_English_Manual.pdf
http://www.psbspeakers.com/articles/TAS-Synchrony-Review
http://www.psbspeakers.com/products/synchrony/Synchrony-Two#heading-downloads
http://www.psbspeakers.com/content/110620153653-PSB_Synchrony_Series_English_Manual.pdf