If you're gonna get one, get the one they just announced/released in the last couple of weeks.
The power consumption is much lower, it's quieter, comes with built-in Wi-Fi, and the chance of it RROD'ing is lower than the older models.
I'd get one myself, but I can't justify the money I'd still have to spent after trading in my current model (which is an old 20GB, and possibly a Xenon launch model which is the most likely to RROD. It's died on me twice in three years).