Hope bumping an old thread isn't frowned upon here, but I just had a chance to in home demo these for a couple of days. They are magnificent. A bit of a laid back speaker, huge bass, a very sweet treble that never gets harsh, and the mid range and bass is so lush and rich sounding it's crazy. This was really my first extended listen to what I would call a high end speaker and the difference versus entry level speakers is huge. I thought my Tannoys were great, maybe they are for their price, but in absolute terms no chance. The PMC's were powered with an Audiolab 8000S integrated.
One day I will probably own the TB2i, just not sure if I can justify the expense right now though. By the way, I also did the knuckle test and there is no cabinet resonance at all. It's a totally dead sound with the PMCs. You may as well be knocking on a block of ice.