overclocking new rig memory question?

Getting new pc next week and iam going to do a bit of tweaking, what is the highest/safest level i could overclock? will this give me a noticable boost in fps in fsx? Also anyone got this cpu/motherboard/memory, will i be able to run the memory at 1066mhz and will this increase if i increase the fsb on cpu?
Intel q6600 cpu Tuniq T-120 cpu cooler
Abit I35pro motherboard
4Gb Corsair TwinX DDR2 XSM2 Dominator, PC8500, 1066mhz
Asus 8800 Ultra 768mb
Vista Home basic 64bit Edition
500gb HD
Intel q6600 cpu Tuniq T-120 cpu cooler
Abit I35pro motherboard
4Gb Corsair TwinX DDR2 XSM2 Dominator, PC8500, 1066mhz
Asus 8800 Ultra 768mb
Vista Home basic 64bit Edition
500gb HD