how would an entry-level tube system compare?

Hi all,

I'm looking for advice on the following situation as I move into the tube world for the first time.

My current non-audiophile, lo-fi system: an old Sony 100W receiver and JBL S36 monitor speakers. 75% of the music I listen to is driving and bass-heavy (techno, house, electronica, hip-hop, rock). On this system, the sound is OK, but I can crank it (I mean _really_ crank it), which I like to do, and the bass is there, which I need.

I'm now planning a move into the hi-fi world. Although my musical tastes would suggest solid-state and big watts, I'm very curious about tubes. For budget and space reasons, I'm looking at integrated tube amps in the <$1500 range (from Cary, Onix, Cayin, Rogue, Eastern Electric, Shanling, VTL, PrimaLuna, and others).

I'm sure any of these tubes systems will take the quality of sound of my music to a new level. My concern is whether they'll be able to match the power, drive, and volume, of my current lo-fi system. Can a <50W tube system shake the house?

As for speakers, I'm still evaluating, but had not necessarily committed to high sensitivity ones. Should that be a requirement?

Thanks in advance for your thoughts and advice.