Low volume listening dynamics

Completely agree about the quality of the first watt and high sensitivity of the speakers for quality low-volume listening...but also consider high efficiency speakers with a flat impedance to really coax some magic out of a low volume.

I went down this path a couple of years ago and now use a 2 wpc SET amp to drive my speakers (94.5 dB). Low level listening is wonderful. Happy as a clam at high tide.

Clams are happy, and so will I be too. Don't want to dominate this format at all, but would like a couple of suggestions on a good first timer tube integrated. Will probably build my own full range speaker pair, concentrating on high efficiency drivers. Most of my listening is CD and HD streaming. No vinyl at the moment unfortunately. Thanks guys for the feedback this far. I have lots to learn.

If you are going with very low power you may want to consider speakers as effecient as possible. I have a pair at 106db.

A high sensitivity speaker may or may not be more detailed than a low sensitivity speaker. The most detailed speakers are ESLs and they are not so efficient. 
The problem of listening at low levels is that our ears sensitivity to bass and treble is greatly diminished so unless you have some way to compensate for this low level listening is always going to be low fi. 
Compensating for this means loudness compensation for the volume you like listening at. Only a digital room control system with the ability to create custom target curves can do this effectively. 
The other solution is.....just turn it up:)