my 1st PNS was a canon, was pretty satisfied with the performance as well as the layout of the menus. moreover i did encounter good service with CSC with my PNS. then i moved on to DSLR, EOS 450D... it was the 1st cam with liveview from Canon and i was pretty impressed by the image quality as well as the built quality... have since moved on to 7D and other L lenses without regret...
why did i choose this over nikon? no idea as well... i dont really like nikon's dslr except D300s onwards that range... beneath this series, i still think canon has a comparative advantage...