Please Recommend Highly Efficient Floor Standing Non-Horn Speaker Suggestions

Apologize if this is redundant but the threads here all seem to recommend horn speakers for tube amps.

HMMMM maybe there's a reason?

Since no price range was mentioned:
Arion Apollo 105db efficient AMT line array but are 4 ohm. 

Thank you thus far.  FYI: Amp is MC275 VI.  I have Legacy Focus SEs being driving by MC611s in another system and love them.  Perhaps Legacy Signature but I need a smaller footprint for the speakers I want to drive with the MC275.  Also, my pre-amp is a McIntosh C2700.  Release the anti-McKraken!

+1 Zu Audio - Soul 6

Legacy, Fyne, NMST, Zu just off the top of my head. If you are using tube amplification you want a speaker with stable impedance that doesn’t go below 4 ohms. Salks need power.

http://coincidentspeaker.com/speakers.htm Owned a pair of the Triumph monitors years ago and they were solid performers. Israel has been doing this successfully for a long time.

Fritz Audio and Salk Audio are highly recommended here for easy to drive speakers. I have Zu Omen Defs which are super sensitive and only need a few watts to drive. I really like them, especially how they separate each instrument and vocal so clearly. The worst thing about them is they are extremely sensitive to placement. Quite the learning curve for me.