Tannoys have a good reputation. I have always liked Tannoys when I have heard them, although they don't tend to be the most neutral speaker on the block. Some of them measure OK and others don't measure well, at least as far as accuracy is concerned. The Klipsch speaker is a neutral speaker, it is fairly accurate. It's a pretty safe bet if you just want a great sound. The Tannoys, I couldn't say much about, as I can't find any solid data on that particular model. My guess is that the Tannoy XT 8F is a more powerful speaker with a higher build quality and nicer finish, but perhaps with a more idiosyncratic sound, while the Klipsch speaker will simply be more accurate and perhaps a bit higher in fidelity.
