Has anyone had the chance to compare the higher-end XLR models from Ansuz? I’m interested in the differences between the Copper and Titanium series — specifically between the D3 and D-TC3 models. Unfortunately, I don’t have access to the D-TC series. The D3 is currently competing with the Valhalla 2 in my system, and I can’t decide which one to choose, while the Odin 2 is out of reach.