I am thinking of buying a flash for my Nikon D70s which is hot shoe attachment. I already have a Sunpak PX40 which is i-TTL coupled but seems to seriously underexpose so, much as I have always like Sunpak I would avoid that brand.\n\nThe dealers keep pushing me at the Nissin Di-622 which looks right and is about the right price. However the Metz (44?) also looks to have a similar spec and price. The only difference is that Metz have been around a long time whilst Nissin is one of those come-and-go names.\n\nWhich should I buy - or should I just put up with a Jessops' own brand 360?