Looking for a good full range floor stander

Mjstoyn most large panels suck. Try an image that is out of focus, the large flat diaphram causes diffraction which gives you a very large unfocused soundstage as both your midrange and top end freq are bouncing off the diaphragm.

Add in poor bass your back wave is cancelling out your front wave which leads to no impact. Even with subs not realistic sounding.

Then add in low efficiency and compression when played loud. 

A large poïnt source with room correction does work in a large room.

Go to a live music show ever see a giant set of panels?

Big room you need big dynamic loudspeakers

Other speakers might control the room better, but for getting lost in the musical pleasure, my money would certainly go for a pair of Wilson Audio Sabrinas. Those are not for GAS people, but for those who truly love music!

Mtdining, the Sabrina are excellent loudpeakers that are not designed for this size room. 

You would need a set of Daw or Alexias to provide enough air movement for this size room.

Large room = high efficiency, high spl, deep bass, physically larger loudspeakers.

It is really that simple, for this reason we recommend speakers like the Legacy Focus, Focus XD with Wavelet, or the Aeris they will fill up a large room beautifully, are they the best speakers in the price range that is a different question, they are really great sounding loudspeakers for the money that will work acoustically in the OP's very large space.

Add in the fact that the OP can go perhaps to a Legacy dealer in his state and listen to the speakers or here them at shows is a bonus.

Dave and Troy
Audio Doctor NJ Legacy dealers

@milpai 

I agree with you that the Proac D48 would be a great choice.  I had a pair of D30r's (the D48's sounded great but were too big for my room) powered by a Bryston 14b cube amp and the sound was fantastic.  At the time I was thinking about the Legacy line but thought the Proac's were much more musical and way better looking.  Hope this helps.