haha,
The L100T and 4006 sound similar, but the 4406 is a bit more tame sounding and doesnt really have deep bass at all.
the Advent has the best deepest bass, but other than that it sounds like a wool blanket was tossed over it when you A/B.
The B&O and VERY detailed in the mids and highs and the bass is very nice. It goes deep enough for most any music.
For my uses though, the L100T does everything right.