Serge,
With the release of the LPC546XX, what you should be worried about is with the future of the Kinetis MCUs.
Compare:
LPC54606J512BD100E U$ 4.69 (for 1K units na Mouser)
180MHZ, 512K flash, 200K ram, ethernet, quad-spi, etc.
MK64FX512VLL12 U$ 7.20 (for 1K units na Mouser)
120MHZ, 512K flash, 256K ram, ethernet, etc.
Ari.