To be equally fair: I own three tube amps, three tube preamps and two tube phono preamps (all reputable brands). After trying (and also spending grotesque amounts of money), I've learned (while listening over many years) that the majority of tube-rolling is absolute malarkey. I can count in less-than one hand the times I "thought" I could hear an apparent difference. Oh yes, how could I forget, for whatever it's worth: tube components are "not necessarily" warmer than SS equipment. In fact, the opposite is sometimes the case. Over on the HD-800 thread this nonsense gets bandied around so often that it's become the mantra.
I broke down and now have an X3 in my house. Ordered the X5 also but not here yet. As an old fart without much DAP experience (except for the idiot-proof IPod Classic), I am scared shiitless. Been reading about it and haven't even opened the box!