FSB and Memory Speed Confusion

So I've been reading through the forum for memory as well as checking out reviews and I've gotten a little confused. I've heard several people say that DDR2 800 memory is a good buy when it matches the FSB speed of the motherboard/processor combination you choose. So the processor I picked has a 1333FSB and the motherboard has 1600/1333 FSB. According to the somewhat confusing quote below and some reading I did online I sort of get this understanding.

Mobo 1600FSB / 4 (Quad Pump Bus) = 400MHz
DDR2 800 / 2 (Dual Data Rate) = 400 Mhz

So in this situationthe mobo and DDR2 with a nice 1.8 voltage would be best for overclocking and matching FSB speeds I think? So what of the processor?

CPU 1333FSB / 4 (Quad Pump Bus) = 333.25 Mhz

So the ram/mobo fsb to pair with this is 667 MHz (666 would of been nicer, the evil ram!)?

Now the reason I am confused about this is that the only CPU from Intel that operate at this FSB cost the same as a black market kidney (I only have one left.). So if I was interested in a system for overclocking with the general components I have listed below how should I proceed? Get DDR 800 and overclock the FSB on the processor to 1600 (if that's possible)? Any suggestion on memory and how I should proceed would be appreciated.



Build Specifications:
Component...........Chipset.....Man...........Model............ Price
----------------------------------------------------------------------------------------
Case...................N/A........... Antec........1200...............179.99
Graphics Card.......ATI ............Saphire......4870x2...........559.99
Motherboard.........Intel X48.....Gigabyte....GA-X48-DS4....224.99
CPU....................Wolfdale......Intel..........E8500............189.99

Edit: Fixed stupid table.