When I got home last nite I fired up the system to see how the Selah XT-8 arrays compare to everything I heard at RMAF. No, even if they offered me an even trade I wouldn't be interested. The XT-8's (mine are ported) seem to have more authoritative bass, and the Fountek ribbons are much better at the higher frequencies than the single drivers. I would say the drivers they're using are comparable to the CSS 4.5" single drivers in my MLTL bipoles - clean sound with none of the peakiness I hear with Fostex drivers, but lacking some of the "air" I hear with a good ribbon or dome tweeter. A two way array seems to offer the best bang for your buck.