The first LX is the Magnum which should be available end of 2004. The rest of the LX line will make their appearance at the New York Auto Show (whenever that is). I've heard a new LX will role out every six months.
There is some pretty good info in the 'Third Generation' section.
The replacment for the LH code named LX will begin shipping sometime in Jan 2004. The 300M replacment and the Magnum will launch first .The Trep replacment ( no name yet) is still a secret , some of our guys from the plant who have been in Detroit building Magnums and 300's have not even seen the Trep replacment . So a good guess would be that it wont come out till very late 2004 or early 2005 .