BYS2

I'm making a new PC and the ram i am thinkin of getting is OCZ 4GB (2x2048) DDR2 1066 PC2-8500 Reaper HPC 4GB Edition Link
OR
2X OCZ 2GB (2x1GB) DDR2 1066 PC2-8500 Platinum SLI-Ready Edition Dual Channel Link

I just have a few issues:

1. What are your opinions on using 2x2gb sticks instead of 4x1gb? advantages of 2x2gb is that it has better OC potential (2 sticks to match instead of 4), lighter loads on the mem controller, but the sticks themselves usually have looser timings than 1gb sticks. So which ones do you think are better? the 2x2gb or the 4x1gb that i listed above? i can get both at pretty much the same price ($5 more for 2x2gb compared to the 2 sets of 2x1gb) right now and i'm leaning towards the 2x2gb because of the better OCing and because the P5K mobo has issues when it tries to handle 4 sticks of 1066 ram. Oh and the timings on the 1gb are 5-5-5-15 and the 2gb are 5-5-5-18 which is quite similar from what i've read.

2. Right now i am getting 1066MHz PC28500 ram, but i'm wondering if thats the right kind. I have read that FSB:RAM speed ratio should be 1:1 (or as close to it as possible). Is this information correct? If so then, my quad Q9450 processor has 1333Mhz FSB, since it is quad pumped this translates to an actual speed of 333MHz. This means that my RAM should also be 333Mhz X 2 = 666 MHz (for dual channel). So is 1066Mhz ram overkill? i am planning on OCing for sure so that probably changes some things. I am hoping to get the Q9450 up to 3.5ghz OCed on air. From all the literature that i've read, the P35/X38/X48 boards should be able to do this no problems at all (different story with nForce chipset). So say i want to OC my processor to 3.2-3.5 Ghz or so, how would this affect the FSB:RAM ratio and stuff.

Thanks