Whenever I get a new plane, the first thing I do is go into the config file and adjust the eyepoint to provide a comfortable view over the nose. I am wondering how many "degrees of ground" it is appropriate to see over the glareshield. This is always an issue because with limited vertical screenspace, I obviously want to be able to see all the primary instruments, but at the same time, don't want the horizon to be an inch from the top of the screen!
To put this another way, when an average pilot is sitting in a plane (say a pa-28 or cessna 172), how many degrees can he pull the nose up before the horizon aligns with the top of the glareshield?