Looking for new speakers for large audio room

What about Proac K6? They should fulfill that size of a room, for sure.

Can you swing some Avantgarde bass horns? 

Amphion Krypton3 or KEF Reference 5? Vandersteen Kentos if you can stretch?

stick w Avant…but add bass cabinets from them as you can afford…

When I heard my first horn speaker it was the Avantgarde Uno Fino.  From there I went on a mission to find a great horn speaker.  I came across a company called Viking Acoustic.  After talking to the owner ( David Counsell) and visiting his studio I settled on Viking Acoustic Grande Voix  Dual Horn speakers.  All I can say is that they blew away my previous Wilson Audio and Sonus Faber Speakers.  Take a look at the website and give David a call.  They are phenomenal!