It is safe to say that the single-core processor is on life support, if not in the casket waiting for an official burial. Dual core is now the entry-level and quad core is the new mainstream performance solution.
The Phenom 9500 and 9600 are very inexpensive options, and once Intel gets their 45nm release schedule in gear, the number of reasonably-priced quad core processors will increase significantly.
But this begs the question of where a true enthusiast is supposed go when everyone and their dog will be running a quad core system.
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