I recently got a pair of Acoustic Sciences Corp TubeTraps. Nice thing about them is that they have one half of the trap that is absorbative and the other half is has a diffractive surface so they can be tuned to clean up the bass while preserving some liveliness in the room. I have used RealTraps and TubeTraps and both do a nice job but I prefer the ASC TubeTraps, although they are more expensive. I am actually using both with TubeTraps in front corners and RealTraps in rear, but hope to switch them to TubeTraps eventually. Also my wife prefers the looks of the TubeTraps. I do have an attic with a bunch of RealTraps that I will need to do figure out what to do with some day.
Room Treatment suppliers
I know about GIK and ATS. I stumbled across another supplier on here that had some really well done art panel and diffusers but can't remember who it was. What are some of the other supplier besides aforementioned?