Well, do you think Mr. Fatal1ty is worth $100 of your money? as that is what it comes down to. The AN8 has back fans and the sound on a PCI X1 port, where as the KN8 doesn't. The AN8 has the excellent Nvidia chipset. I have a S939 Abit VIA chipset motherboard collecting dust right now, and it is terrible, has problems all the time. I wouldn't be in a hurry to get another VIA abit mobo, nvidia one should be alot better.
Don't get corsair XMS - doesn't overclock as well as what you can get for the same price. If you are overclcoking, get OCZ platinum rev. 2 if not, the cheapest you can find that is PC3200.
Cisco CCNA, Comptia A+, 1/3 through CCNP