Equipment questions and advice needed, looking to complete the Stobist series.

[Canuk]

Thanks to all for the replies. That was the confusing part for me to try and understand. The GN numbers for different flashes always seem to give different information. Some are in meters, some in feet, some @ 105mm some @ 35mm.
So from what I get from all of this is that the Yongnuo flashes for 1/2 the price maybe the better way to go.
Thanks again.