XPC Tool Overclocking

Hi i just downloaded the xpc tools and I am have a question regarding overclocking the cpu. My cpu is a 2.8 now recently overclocked to 3.0 and its running inbetween 50-55 degrees while gaming playing ravenshield. I was wondering if I should overclock it any higher or just leave it where it is my 6800gt is currently clocked at 410 and 1110. My aquamark score after the overclock went from around 61,000 to 64,000 and ravenshield has been running very smooth even with vsync off hardly dropping below 70fps with all graphics on high 1024x768. I was wondering should I try to go higher or am I right where I should be and not tinker with it anymore

thanks

here is an image of the xpc tools to see what I am working with.
http://home.comcast.net/~rjc13/oc.jpg

if its running what you want fine then leave it as it is.
it seems a little lot in there though, more OCing=more heat so be careful