Please help me treat this room professionally enough to mix in?

[Syncamorea]

What is your budget? Your room is nearly cubical and that means it's difficult to treat well because room mode in the bass and midbass result from the dimensions of the space. To get the best from a room that size, you will need a large investment in bass traps. Even if you hired one of the best studio designers in the world, the dimensions would limit the result. Many designers recommend a minimum of 1500 cubic feet.

BUT: pay your dues with respect to bass traps and you may be surprised at the amount of improvement you can get as compared to untreated. Read up on limp mass vinyl and VPR traps. Good luck!

[mml]

If you don't own this new space, move. This will never sound good. It would be cheaper to move than to treat the room. That said, get some of those prime acoustics corner bass traps in all corners and maybe a couple more of the wall ones on each side. If that isn't enough, there are active tunable bass traps out there that you can set to a specific room mode frequency. Expensive, but effective.
http://www.bagend.com/ETrap.htm

[mml]

Those corner panels aren't going to do much. You really need the limp mass corner traps stacked two high in all the corners, and then probably the active bag end etrap for the room mode bump. And a cloud over the mix position.