Rusty_M - At an ambient air temperature of 21 degrees Celsius my cpu core temps do not go above 50 degrees at full load either - that's with my Hyper 212, IC Diamond 7 Carat Thermal Compound, and just one Scythe S-Flex 1600 rpm fan.
Also, Prolimatech recommends 120mm fans between 1200 rpm and 1600 rpm for optimal performance - 1200 for casual gamers and 1600 for hardcore gamers.