decent flashgun review sites sought

Need find good flashgun sites
Any links to decent flashgun review sites please, e.g. approaching flashguns
like dpreview approach body reviews ...sites that show test comparison shots
, not too blinding with science, definitely not having any means of selling
you anything on the site.
I would dearly like to see especially Metz54 and metz slave unit as flashgun
off camera setup versus Speedlite 420ex & 580ex wireless off camera for
Canon 20D, We compare on same subject type comparisons. Also compare Nikon
D70 and Canon 20D with fguns single and duo off and on camera, which kit in
capable hands is best and most consistent.
Full manual options and results shown.

Thanks in advance
Steve