This topic comes up from time to time.
It really depends on how loud you play your music, how close you sit to the speakers,
the sensitivity of your speakers (and even your room acoustics).
LIO will drive most speakers very well within reason, but for those who want high SPLs, you either need to sit closer
and/or use higher efficiency speakers.
As Bloodsplint mentioned, I've used Harbeth at shows (including the 83.5dB P3ESR) and in the standard hotel room size, LIO does a fine
job driving them.
Over the years, I have heard from many customers who found LIO to sound like it has more power than its RMS power suggests.
You might want to try it - and you can always turn the amp module and keep LIO as a Preamp (with dac, phonostage, headphone amp, etc.)
Hope this helps!