From ultra-low power MSP430™ MCUs and high-performance C2000™ real-time controllers, to Hercules 32-bit ARM-based safety MCUs and Stellaris® ARM® Cortex™-M4F MCUs, TI offers the broadest range of embedded control products.
I have just switched to the new Stellaris Cortex-M4 controllers. Coming form the 8bit world (8051 and AVR) and more recently, with the current project, the archaic Motorola M-Core. Stellaris Cortex-M controllers are a pleasure to work with! The Stellaris libraries get you up and running with ease!