You won't be able to tell your internet speed with ping.
go to speedtest.com
and when you test your speed, and you see something like 30Mb/s
it means megaBITS, dont be confused with megaBYTES
there are 8 megabits in 1 megabyte
if you arent downloading in the background
then all 3 should be fine with 1megaBYTE (or 8megaBITS ofspeed)