Thanks everyone for the recommendations.
I’m noticing that many of these manufacturers are recommending amplifier powers a little above the 20W that my LTA UL+ produces.
For example Focal recommends 25W minimum, Fyne Audio (F500SP) & Mofi (Sourcepoint 8) recommend 30W minimum. KEF (LS50) recommends 40W minimum.
Should these be taken very seriously, or are they less important at small distances requiring lower volumes? If taken seriously this will restrict my options considerably.