You'll also want to look at the general configuration of the plane to get a sense of what end of the available pitch/diameter spectrum you'll be wanting to sample from.

ex. - a draggy biplane with flying wires and a lot of scale junk would fly like crap with a small diameter high pitched prop and a lot of RPM's, but that same prop might be ideal for a small/clean fast racer, even though both planes might be using identical motors/ESC and battery.