Lpc2000

I wonder if anyone can offer opinions on these programmable oscillators.
The LTC6903 and LTC6904 are oscillators programmable from 1kHz - 68Mhz.
One is programmed via I2C the other via SPI.

http://www.linear.com/pc/productDetail.do?navId=H0,C1,C1010,C1096,P2415
http://www.linear.com/pc/productDetail.do?navId=H0,C1,C1010,C1096,P2416

Does anyone know if these are suitable for use with microcontrollers as
their main clock source? They are probably too expensive for products
but they look very useful for prototyping. I'm playing with a half dozen
different ARM chips with varying clock rates, so it would be convenient
if one oscillator could work with all of them.

Any opinions or comments?

Thanks,
Doug