A better alternative, if you're willing to wait just a bit:
https://estore.ti.com/Stellaris-LaunchPad.aspxThat's a Cortex-M4 which is 32-bit and runs lotsandlots faster than the MSP430. The Stellaris also has built-in USB support, more ADC channels and resolution, 16x the flash, 64x the RAM and lots more I/O.
Also, ARM is pretty much taking over the world so if you want good experience I'd look for something with an ARM core in it :)
There is a place in this world for MSP430s, ATTinys, and other little 8/16-bit micros but when it comes to something I want to play with, I'll take the above board - especially considering that it's only 69 cents more expensive. :)
FTR, I preordered awhile back and I think my 2 are supposed to be here any day now!