Attached Link: http://www.knucks3dstuff.com/benchmarks.html

With that computer render times should be pretty quick and since you have 2 computers you can set-up a network render for really complicated scenes. You can go to the above link and download a benchmark scene to see how you computer will compare to others. There was another site with a more complicated scene but I can't find it right now. I have a 1.67Ghz AMD and it rendered at 4m49s