Pete,
MicroPure Kotaros - I own a pair and can't recommended them highly enough. 4" FRD with a Murata supertweeter handling 15KHz and above. Two kaveats - they're a bit pricey (ca. USD 3K) and if you'd like any kind of bass below 70Hz you'll need a sub.
Good luck and Merry Christmas.
Cheers,
Garry