I haven't heard the latest version yet, but the SE upgrade is definatley well worth the money. The new tubes and caps do need to burn in for at leat two weeks, but even within the first few hours, the improvements in transparency and low end dynamics were very obvious. That's in direct comparison with an identical unmodified MkII that my friend brought over. Other that the tighter and more dynamic low and and the feeling that some veil is now gone, what struck us was the exceptional tonal purity and refinement in the midrange. I did not feel the upgraded player is less musical. On the contrary, I find it even more emotionally involving and lifelike. My friend's observations were exactly the same. He's just having his modified.