I'll also add a thumbs up for the PT-40's. I have 7 sets all working fine. Honestly, although I have them, I don't use my DT-40 Pros enough to give an educated comparison. I love DT40 wides though and I'm hoping that the Compact 506's can match them and let me spread a beam show out as wide as the DT40wides. I have a fairly short throw between the back wall of the ballroom and dance floor so the wider I can get beam cues to display, the better. I swear the 40wides can go in excess of 90 degrees when necessary. (Assuming we are using the same definition of 90 degrees.) I'n not certain the Compacts are really designed for the same thing though.