We use the ARMmite Pro (predecessor to the LPC2103) to control a high-speed frequency digitizer that we make for one of our products. It offers great "pin-level" sensing and control, and can do ‘smart’ things like send the data as serial, and it can be programmed quickly in a BASIC-type language.
        By orienting the design around the Pro, I can make changes in the device’s operation quickly in software rather than making hardware design changes, which is a much slower process.