One problem would seem to be that what the speaker makes and what you hear may not line up. The speaker that sounded great when you auditioned may have a problem with standing waves in the listening room: or odd room harmonics might make problems.
We can, of course, attempt to treat a room to match what the original listening environment was; but that seems a little rough given that audition rooms will not be identical either.
And heaven forbid your tastes, or hearing, change.
But it's apparently worked for you: and I certainly cannot argue with success.
Out of curiosity: what do you consider the "British Sound"? I have both 801 Series 2 and Nautilus 801's, and both measure quite flat on-axis above 1KHz (I haven't yet done accurate woofer measurements to tell you where they remain flat to, nor much in the way of off-axis measurements: I am still getting my sea-legs here)