I've followed Tannoy line for many years,
The higher end tannoys, i.e. those having 10" drivers and bigger, are best suited to larger spaces.
They can be a little challenging to setup, but very rewarding once good setup is acnieved. Toe-in is important and acute.
Even those models with the smaller 6" drivers can present problems especially if acoustic room treatments have not been dealt with.
Compared to more "modern" designs many models appear a little "old school" but with all things in audio - let your ears be the judge.
If you compared them to other speakers in the same snack bracket on sound quality alone you might be surprised at performance level of the Tannoys. They often better many higher priced brands/models.
I own various Mercury models for use in my A/V system simply because they offered the best bang for the buck.
I often listen to larger models at a local audio store and am still amazed at the superb reproduction qualities of solo vocal and full orchestral tracks - which I believe demonsrates their ability to handle acoustic subtleties, whilst being very adept at maintaining clarity as the decibels climb.
They are pretty efficient, so matching to amps is relitivelly problem free, but there are some amps that seem to dislike them, so do your research.
A Comment from my local tannoy store owner...
"Tannoys tend to be the last speaker we sell to our customers"
Hope that helps