The minute I made the switch to the Luxman I heard a boost in bass.
In terms of solid state, I can't argue with you, especially the extension and control in the bass. Maybe this is why I'm less interested in a sub for music? While the mid and treble are very liquid and smooth I can also see where a real tube-phile would still stick to tubes.
If I had spare cash I'd probably really like trying the Luxman tube integrateds for a while too.