Mullardman
Moderately extreme...
Given almost all the distortion in any audio system comes from the speakers the most logical approach is to view the amp and speakers as a unit and buy what matches best.
I'd agree with that.. and then go further. Unless we are very very fortunate.. most of us have to fit our audio system into a home environment which is shared with partners, kids, pets, etc. Some of us have a separate listening room.. I wish...
So.. in my case.. I have limited space in which to fit speakers.. but by sheer good luck, found ones which not only sound good pretty much anywhere... but also work very well in my room... in the limited space available. They also seem relatively unfussy as to amps.. so although relatively insensitive by current standards..they have a highish overall impedance with no punishing dips. As such they worked well with IONs and of course the Papworths were more han capable of blowing them through the wall were I unwise with the controls.
However.. when I bought my LFD.. it was very likely to be my last amp, so I took extra special care. I home demmed several amps and the LFD came out as clear winner.. driving my speakers in my room. Tonal balance, imaging/soundstaging and clarity all shone. Amps which had sounded good in a dealership with 'similar' speakers to mine..fell flat on their arses in my system.
Find a speaker you can live with. Find an amp to drive it... And do a home dem..