Which Intel CPUs should I get?

Hello all.

I am planning to upgrade my computer again next month. I am at a loss on
which Intel Core 2 Duo CPU to get since there are so many models:

E7300 (2.66 ghz 1066 fsb) = $135
E7400 (2.8 ghz 1066 fsb) = $155
E8200 (2.66 ghz 1333 fsb) = $175
E8400 (3.0ghz 1333 fsb) = $190
E8500 (3.16ghz 1333 fsb) - $205
Q6600 (2.4 ghz 1066 fsb) = $200
Q8200 (2.33 ghz 1333 fsb) = $210

I am planning to have 2 GB of RAM, ATI Radeon HD 4850(most likely)/4870
(all details cranked up at 1280x1024 resolution), use Windows XP Pro.
SP3 (screw Vista and its DirectX 10+), etc.

Thank you in advance.
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