I would worry first about how fast your FSB will go. Faster FSB with looser RAM timings should give better overall system performance than a slower FSB with looser timings.
So if your max FSB is at (about) 214 MHz or below, then the PC3200 will (should) run at your FSB speed. (No guarantees about maintaining a 2-2-2 timing if you OC the FSB beyond 200MHz, though.) If your FSB can go faster than that, you will need faster RAM (PC3500 or more), and then just get the RAM with the best timings that you are willing to pay for.
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