I picked 10. Hey, how about putting a disclaimer on the EM list, spelling out the disparity since ems are respectivley 'fewer and farther between' in comparison. That would give the casual observer (noob) a barometer of sorts. Give the spiel about production numbers and their relevance to the list, and tell them to read reviews of pins they are considering vs the ratings. That would be a good service to new pin folk.
Edit-should leave it at 3-5 after reading others opinions.