I didn't come to Sonar until X1 so I never experienced pre-Skylight versions. For giggles last night I watched one of the Groove3 Sonar 8.5 tutorials and it made me appreciate just how much better it looks nowadays! Boy that interface looked cluttered and ugly. I too hope that they reintroduce color customization (and even skinning) but I think overall, the X-series looks way better than it did before.