I have just bought a Canon 10D and am looking for a flash gun for it. I have a Sigma 17 - 35, a Canon 28 - 90 and a Canon 75 - 300 lenses. I am attracted to the Canon Speedlite 420EZ but see that the Sunpak PZ4000 is £35 cheaper and seems to have the same capabilities. Has anyone any opinions as to buying Canon or Sunpak? Thanks in advance. David