The RAM will do fine for the setup you picked out. Since the RAM you picked is rated up to 1066mhz, you shouldn't worry about the RAM not keeping up while overclocking the Q9550.
Just to add onto 3oh6 regarding the timing part. Note very carefully that RAM timings are crucial to a good and stable overclock, while squeezing the most out of the RAM. Common sets are 5-5-5-15, 4-4-4-12 (or 8), and 3-3-3-8. You won't find it lower than that. 3oh6 already mentioned the relationship between timings and frequency, however not ALL RAM will do what you tell them to. It's best still to research on the tweakability of RAM before purchasing. However you made a good purchase with the G.Skills.
Make sure you come back later, after you set up your system, and we can work on Subtimings.
