(I moved this tread to the Lounge as it was not about e-ink devices.)
I agree with Jaajan, the current crop of Intel devices offers a great price/performance ratio and run cooler than the AMDs. Once there was a time when all I would buy was AMD cpus. Those days are gone. I find it increasingly harder and harder to justify AMD units. In fact, the last two computers here are Intel machines. (OK, in the interests of full disclosure there are still 3 AMD units running here.)
Any of the options mentioned will yield a great computer. My only concern is that if you go into OCing the beast without custom cooling, all the fans will make racket. Be sure to have a good audio system available to drown out the cyclone.