Also found a paper that might have a few more idea for benches.
Any chance of getting a Povray benchmark test in PTS before 1.0 ?
This page might be of some use if you do concider putting it in.
There is also a nice benchmark already setup for blender as well
and a bit here
I have a few problems with POVRay management at this point.
I had issues with Version 3.6 and right now only 3.7 betas are available and those are on a timed basis IIRC and then will lock out once the date has passed.
There were also some items with the license concerning sharing the results that had concerned me.
This was a while ago but I can look at it again.
Regarding the blender bench file, I've seen that file before and recall running into some problems when attempting to run it from the command line and have it report the results to stdout and quit. Have you tried it?