If you're not thrown off by the Pioneer name, you may want to consider their EX-Series which was developed by TAD (Technical Audio Devices - Pioneer's high-end speaker division). These speakers were developed by the same guy that developed the highly acclaimed $45,000 TAD Model-1.
http://www.pioneerelectronics.com/pna/v3/pg/album/0,,2076_310069828,00.html
They use a beryllium tweeter, but it is used in conjunction with a Magnesium midrange instead of the more expensive beryllium midrange used in the TAD speakers. These speakers have been raved at recent shows when used in conjunction with Bel Canto electronics. Since I'm a Bel Canto dealer, I'm seriously considering looking at evaluating these speakers to possibly add them to our lineup on the suggestion of John Stronczer (owner/designer Bel Canto). I wish they marketed them under the TAD name though sooner than Pioneer.
http://www.pioneerelectronics.com/pna/v3/pg/album/0,,2076_310069828,00.html
They use a beryllium tweeter, but it is used in conjunction with a Magnesium midrange instead of the more expensive beryllium midrange used in the TAD speakers. These speakers have been raved at recent shows when used in conjunction with Bel Canto electronics. Since I'm a Bel Canto dealer, I'm seriously considering looking at evaluating these speakers to possibly add them to our lineup on the suggestion of John Stronczer (owner/designer Bel Canto). I wish they marketed them under the TAD name though sooner than Pioneer.