I have a Constrictors NW cage for my carpet and plan to get another for either the female Angolan or one of my female BPs . . . and probably another one after that. I love it. I've had it for nearly a year and have yet to scratch the acrylic. The drop down door was the only thing that made me waffle on buying it, just because of Sheila's feeding response and wanting an easier way to block her, but I've had no issues. I'm glad I went with it.
So, total vote for the NW cage here. Great cage, great quality, and Ed was awesome to deal with.