Thanks Erik and Jim. Good stuff. Package ideally SMD - don't care which - but not essntial. I favour 5v - only because it gives greater dynamic range to the sensors I intend to use. However, 3v is okay.

Top of the priority list (assuming >=10b/>=3channel ADC)is ease and cheapness of (assembler) code development (sorry folks, can't/won't do C). I'm sort of frightened by Silab's wide range of devkits. If I decide the target processor I initially select is wrong, do I have to spring for a new DK? I note some processors use JTAG and others C2. Any major differences, or are they just different interfaces?

Do Nuvoton pre-code their loader ROMs these days?

Thanks again,
Dave