This Might Not Exist, Any reasonably priced, smaller speakers with 100db Sensitivity?

Wow. If that's how you're going to choose an audiophile system, good luck to you. I have always considered loudspeakers the only starting point but if you are into buying somebody's super low-power amplifier as your starting point then you're probably in for quite a ride. I have no suggestions for an ultra-efficient loudspeaker. I have ever really enjoyed one beyond minutes.

The sonic signature of an amplifier seems far less important than that of a the loudspeaker. I think some Svengali has you beaten from the start. But just my I.M.O. not humble at all. :-)    Buena suerte in your choice!

@musicaddict I totally disagree.

I say there are basicly two types of high end systems.

Solid state systems, generally high power and many of the speakers that are highly regarded have sensitivities in the 85-88dB/watt-meter.

Then there are the single ended tube systems, 6 wpc or less, and speakers in the sensitivity range of 96-110db/watt-meter.

You have to choose one or the other.

It is not uncommon for people to become married to a low sensitivity speaker and totally rule out the second option. dealers love these people since they have a lot more expenive amps to sell them in the ss 300wpc and up range. In fact, dealers will usually guide customers down this path.

Jerry

PS there are a few ss amps that cater to the low power market, but most systems fit into the above 2 categories.  I'll also add that there is another emerging category--the high power tube amp aimed at the 90dB sensitiveity speakers.  While not bad, SET fans are not on board.

Nothing wrong with building a system around a particular amp, especially if there is a specific tube you like the sound of. Low powered tube amps have limitations, as has been stated above, with speaker choices. More often than not, they require bigger boxes. I write this as I’m listening to a type 45 amp, driving a pair of 6’ tall double backloaded horns using a full range driver. Not to everyone’s taste, but I find the listening experts be quite enjoyable. 
 

Good luck with your search!

 I'll also add that there is another emerging category--the high power tube amp aimed at the 90dB sensitiveity speakers.

"Emerging"?  Hardly.