60C for an Intel Core i7 950 at full load is pretty good. What is you ambient room temperature? I ask that because the results should be stated as the number of degrees above the ambient room temperature. My results vary between Summer and Winter due to the change in room temperature.
Scythe S-Flex fans are my current favorite. I use them for cpu heatsinks and case fans. If memory serves, Prolimatech recommends fans in the 1200 rpm to 1600 rpm range. I use the Scythe S-Flex 1600 rpm fans.
Which thermal compound did you use? Did you follow instructions for your cpu when applying the compound? Is the heatsink seated properly on the cpu? Are there cables, wires, or other components which might obstruct airflow? These are additional factors which could affect temperatures.
Since you have case fans on the rear panel and top panel you have an option. One of the fun things about building your own pc is the ability to experiment. Try it both ways and see which orientation works best for you. Individual results can vary.