This hobby is so subjective and system dependent that individual opinion, whether it be from a casual user or even professional reviewers, is almost useless. The handling of The Absolute Sound's reviews of the NuForce 9SE "Amplifier Of The Year", its inclusion in their class D shootout, and recently the 9SE v2, is a wonderful example of subjective audio opinion and editorial disagreement.
Compared to my linear solid state and tube amplifiers class D amplifiers have taken the most effort to integrate into my system to enjoy their full potential and an understandable reason for many of the negative experiences. I'm personally very skeptical of any reference of class D amplifiers sounding tube like. While there may be certain areas were the two may reach a similar timbre their general presentations are different. You like the sound of tubes, buy a tube amp.