Quote from mgookin:
I just spent 15 minutes browsing Newegg. It's amazing what's out there. AMD 6 core 2.6ghz cpu for $199. Some mobo's have up to 192gb ddr3 capability.
Few apps use 6 or 8 cores. The best bang for the buck, as soon as Intel has the chipset issue fixed and distributed, will be the Core i7-2xxx CPUs. Even though "only" 4-cores, about 50% more power than the i7-950... and for <$300.