Well Tim if you read around the forum alot of people are complaining about Q6 series core temps, be it legitimate or not. If your not going to overclock this won't be an issue unless you live in a very very hot climate. Before you decide which cpu to get read Toms GPU vs CPU upgrade articles since you are not going to overclock and you are building it for games.
"However, games are not 100% dependent on the graphics card; the Geforce 8 and 9 require a basic level of power, otherwise they are unable to exploit their 3D potential. The speed of the CPU should lie somewhere between 2600 and 3000 MHz; any lower, and the new graphics chips lose considerable performance.
There is no obvious advantage to quad cores over dual cores, at least according to the graphics-based benchmarks. In order for the Q6600 to compete with the dual core E6750, the same clocking rate is recommended. If you wish to combine an E2160 with a Geforce 8800 or Geforce 9, you will need to overclock. Without a clock rate of at least 2400 MHz, you will lose a considerable amount of graphics performance, because the card is not fully loaded."
I WOULD oc a Q6600 to 3Ghz and spend the savings on good 1066Mhz ram personally.