The room does not appear to be that big, can't tell how deep it is, I would think one 600 would huff, and puff, and blow those walls down. I would recommend you get a throw rug or something. With that bare wood floor and what appears to be fairly bare walls, you will get a lot of echos reflections. I could not believe the improvement once I carpeted my basement, it was like night and day. Very small additions to room decor will help a bunch...

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85