Stillpoints Aperture or Synergistic UEF panels Which one?

I've never used any Synergistic products but use 4 Stillpoints Apertures behind the listening position.  They are wonderful!  They don't make the room too dead or too reflective...just right.  I have had them for 4 years so not sure which version they are.  They are expensive but my dealer gave me a great price on them.  Good luck

@ozzy,

I have a wall 2' behind the listening position and was having decay time problems at certain frequencies. I first tried large absorbing panels on the wall but it just killed the sound...they sucked all of the midrange and top end out of the music. My dealer uses Apertures behind his listening position and suggested I try them. I bought 2 at first and really loved what they did to the sound so I bought 2 more. Now the midrange and top end are back and detailed and no more reverberation time problems. They don't do much for bass below 100hz but really work for midrange and top end frequencies. I would like to be able to place (2) deep center stage between the speakers but I would have to buy a stand to hold them at the right position.....still thinking about that.

I also have (4) 16" ASC tube traps in corners behind my speakers.  They work so well with the Apertures and control a different area of the frequency....I would never sell my ASC tube traps.