Solid State Low powered Amplifiers

How does it sound compared to regular Class AB amps? Specs show this. No caps. Could be a fun little test amp, more if it can hold one’s attention.

Here’s a user review. https://db.audioasylum.com/mhtml/m.html?forum=amp&n=249357&highlight=headphone&r=&search_url=/cgi/search.mpl Looks pretty positive. I’m thinking that this thing might be a near perfect solution to drive my ~90db center channel speaker. All I need is a good balanced passive mono or bridgeable stereo preamp/attenuator between the amp and my 8-channel DAC. Only if I wasn't much impressed by the sound would I swap in my First Watt F4 power amp.

You are looking for low heat from the amp, not necessarily low power output.  You should be looking at Class D amps.  I don’t know much about them, but, I am sure there are many decent examples out there.

Like a few others have recommended in the above posts, the First Watt amps would be a good fit for you and the Klipsch speakers.  I use the First Watt F8 with my Volti Razz and am very satisfied with the synergy.  My F8 runs warm but is not hot to the touch..... also live in the south! 

The First Watt J2 I had in my system sounded quite good--not really like a good low-powered tube amp, but good nonetheless.  However, it ran fairly hot, so I don't know if would help your room situation.