Tube amp for planar speakers and SS pre

I have wanted for some time to move to planar speakers - cannot get what I want from 3-way speakers on classical music. I own the pass labs x-1 pre which I intend to keep. From reading back posts, I can see the logic in mating a ss-pre with a tube amp. However, most tube amps sound loosey-goosey to me in the bass.

I suspect I am probably underexposed. So... What tube amps are likely to work well with my Pass Labs pre and planar speakers, specifically maggies or sound labs? Will I be able to get tight bass, or will there always be a trade-off here? I would love to have a better technical understanding of the differences between the way solid state and tubes provide head room.