Not sure why, but it almost seems like the further up the food chain you go with Esoteric, the more warmth/musicality becomes evident. Try to listen to an "-01" of some type and I think you'll probably hear this.
Another option might be to try the X0-3se with some "warmer" cables. That might be your most cost-effective solution, so that you get both the detail Esoteric is famous for, as well as the slight bit more "warmth" you are apparently after. A good Esoteric dealer might be able to help you with that.